Can I upgrade this model?

You can use a cardbus/pcmcia to pci adapter card just like this one below:

99% of laptops come with wireless card built in to motherboard so to do upgrade would be very useless and expensive. easier way to upgrade to N wifi would be to just get a PCMCIA wireless n card from any pc store and plug it in to a available pcmcia slot. first make sure it is available on your laptop. it is on ether left or right side of laptop.usually has a little button that can be pushed to eject ether the card that is in or the plastic piece that is put in there to close the hole.here is a link with how some of them look like. http://www.google.com/images?hl=en&q=pcmcia&um=1&ie=UTF-8&source=og&sa=N&tab=wi&biw=1024&bih=584. hope this helps.

your computer does not support 1GB memory sticks. The max memory for that system is 1GB which would be 2 sticks configured as 512MB

see below for the specs (i bold, italics and underlined the main part)

Processor Intel® Celeron® M Processor 370
1 MB L2 Cache | 1.50 GHz | 400 MHz FSB Display Screen 14-inch Widescreen Ultrabright™ WXGA TFT Chipset Via VN800 Memory 256 MB DDR2 (1 × 256 MB) SODIMM
Total slots: 1 DDR2 slot | Available slots: 0 DDR2 slots
Expandable to 1 GB Video S3 Graphics UniChrome™ Pro IGP
Up to 64 MB shared VRAM Audio AC'97 2.3 Compliant Hard drive 40-GB 4200 RPM hard drive Optical drive DVD +/- RW Multi-Format Double Layer
Write maximum: 8X DVD+/-R, 6X DVD-RW, 8X DVD+RW, 2X DVD-R DL, 2.4X DVD+R DL, 24X CD-R and 16X CD-RW discs
Read maximum: 24X CD-R/RW/ROM, 8X DVD-R/RW/ROM, 4X DVD+/-R DL, RAM discs Media Reader 4-in-1 Digital Media Manager
Secure Digital™, Memory Stick®, Memory Stick-Pro®, and MMC™ Modem 56K ITU V.92 ready fax/modem Network 10/100 Mbps built-in Ethernet
802.11g integrated wireless (up to 54 Mbps) Interfaces

• 2 - USB 2.0 ports
• 1 - VGA external connector
• 1 - RJ11 (modem)
• 1 - RJ45 (Ethernet LAN)
• Microphone jack
• Headphone jAck

Pointing device Touchpad with vertical scroll zone PCMCIA 1 - Type I or Type II; Card Bus Battery 6-cell Lithium-ion Dimensions 1.1 to 1.24-inches (H) × 13-inches (W) × 9.7-inches (D)
28 to 32 mm (H) × 330 mm (W) × 246 mm (D) Weight 5.01 pounds
Processor Intel® Celeron® M Processor 370
1 MB L2 Cache | 1.50 GHz | 400 MHz FSB Display Screen 14-inch Widescreen Ultrabright™ WXGA TFT Chipset Via VN800 Memory 256 MB DDR2 (1 × 256 MB) SODIMM
Total slots: 1 DDR2 slot | Available slots: 0 DDR2 slots
Expandable to 1 GB Video S3 Graphics UniChrome™ Pro IGP
Up to 64 MB shared VRAM Audio AC'97 2.3 Compliant Hard drive 40-GB 4200 RPM hard drive Optical drive DVD +/- RW Multi-Format Double Layer
Write maximum: 8X DVD+/-R, 6X DVD-RW, 8X DVD+RW, 2X DVD-R DL, 2.4X DVD+R DL, 24X CD-R and 16X CD-RW discs
Read maximum: 24X CD-R/RW/ROM, 8X DVD-R/RW/ROM, 4X DVD+/-R DL, RAM discs Media Reader 4-in-1 Digital Media Manager
Secure Digital™, Memory Stick®, Memory Stick-Pro®, and MMC™ Modem 56K ITU V.92 ready fax/modem Network 10/100 Mbps built-in Ethernet
802.11g integrated wireless (up to 54 Mbps) Interfaces

• 2 - USB 2.0 ports
• 1 - VGA external connector
• 1 - RJ11 (modem)
• 1 - RJ45 (Ethernet LAN)
• Microphone jack
• Headphone jAck

Pointing device Touchpad with vertical scroll zone PCMCIA 1 - Type I or Type II; Card Bus Battery 6-cell Lithium-ion Dimensions 1.1 to 1.24-inches (H) × 13-inches (W) × 9.7-inches (D)
28 to 32 mm (H) × 330 mm (W) × 246 mm (D) Weight 5.01 pounds
Processor Intel® Celeron® M Processor 370
1 MB L2 Cache | 1.50 GHz | 400 MHz FSB Display Screen 14-inch Widescreen Ultrabright™ WXGA TFT Chipset Via VN800 Memory 256 MB DDR2 (1 × 256 MB) SODIMM
Total slots: 1 DDR2 slot | Available slots: 0 DDR2 slots
Expandable to 1 GB Video S3 Graphics UniChrome™ Pro IGP
Up to 64 MB shared VRAM Audio AC'97 2.3 Compliant Hard drive 40-GB 4200 RPM hard drive Optical drive DVD +/- RW Multi-Format Double Layer
Write maximum: 8X DVD+/-R, 6X DVD-RW, 8X DVD+RW, 2X DVD-R DL, 2.4X DVD+R DL, 24X CD-R and 16X CD-RW discs
Read maximum: 24X CD-R/RW/ROM, 8X DVD-R/RW/ROM, 4X DVD+/-R DL, RAM discs Media Reader 4-in-1 Digital Media Manager
Secure Digital™, Memory Stick®, Memory Stick-Pro®, and MMC™ Modem 56K ITU V.92 ready fax/modem Network 10/100 Mbps built-in Ethernet
802.11g integrated wireless (up to 54 Mbps) Interfaces

• 2 - USB 2.0 ports
• 1 - VGA external connector
• 1 - RJ11 (modem)
• 1 - RJ45 (Ethernet LAN)
• Microphone jack
• Headphone jAck

Pointing device Touchpad with vertical scroll zone PCMCIA 1 - Type I or Type II; Card Bus Battery 6-cell Lithium-ion Dimensions 1.1 to 1.24-inches (H) × 13-inches (W) × 9.7-inches (D)
28 to 32 mm (H) × 330 mm (W) × 246 mm (D) Weight 5.01 pounds
Processor Intel® Celeron® M Processor 370
1 MB L2 Cache | 1.50 GHz | 400 MHz FSB
Display Screen 14-inch Widescreen Ultrabright™ WXGA TFT
Chipset Via VN800
Memory 256 MB DDR2 (1 × 256 MB) SODIMM
Total slots: 1 DDR2 slot | Available slots: 0 DDR2 slots
Expandable to 1 GB
Video S3 Graphics UniChrome™ Pro IGP
Up to 64 MB shared VRAM
Audio AC'97 2.3 Compliant
Hard drive 40-GB 4200 RPM hard drive
Optical drive DVD +/- RW Multi-Format Double Layer
Write maximum: 8X DVD+/-R, 6X DVD-RW, 8X DVD+RW, 2X DVD-R DL, 2.4X DVD+R DL, 24X CD-R and 16X CD-RW discs
Read maximum: 24X CD-R/RW/ROM, 8X DVD-R/RW/ROM, 4X DVD+/-R DL, RAM discs
Media Reader 4-in-1 Digital Media Manager
Secure Digital™, Memory Stick®, Memory Stick-Pro®, and MMC™
Modem 56K ITU V.92 ready fax/modem
Network 10/100 Mbps built-in Ethernet
802.11g integrated wireless (up to 54 Mbps)
Interfaces •2 - USB 2.0 ports
•1 - VGA external connector
•1 - RJ11 (modem)
•1 - RJ45 (Ethernet LAN)
•Microphone jack
•Headphone jAck

Pointing device Touchpad with vertical scroll zone
PCMCIA 1 - Type I or Type II; Card Bus
Battery 6-cell Lithium-ion
Dimensions 1.1 to 1.24-inches (H) × 13-inches (W) × 9.7-inches (D)
28 to 32 mm (H) × 330 mm (W) × 246 mm (D)
Weight 5.01 pounds

we need model number of the laptop please mdw 500s i cannot find listed. If its the same as the nx 500s then ddr 333 is required (200 pin sodimm modules)
for wireless they installed
Intel® PRO/Wireless IEEE 802.11b/g network card, Mini-PCI Pentium® M models only)
-OR-
Broadcom IEEE 802.11b/g network card, Mini-PCI (Celeron™ M models only)

• FN+F2 keyboard combination toggles wireless networking
• Antenna: Uses factory-installed internal antenna assembly
• Operating channels: 11 selectable channels
• Security: 128 and 64 bit WEP encryption
• Operating Frequency: 2.4 GHz Direct Sequence Spread Spectrum
• Maximum Data Rate:
  54 Mbps (IEEE802.11g)
  11 Mbps (IEEE802.11b)

I am not sure where you will find a mini PCi card to suit i would just use a slot in pcmcia card or usb adaptor

HI Friend

1.Open the website www.linksys.com/download
2. Enter the model number and hit enter
3. Click get downloads and drivers
4. select the version and scroll down a little,to your left you will see downloads and just under that you will see firmware
5. Download and save it onto your desktop.
6. Open internet explorer and type 1925.168.1.1 and hit enter. leave the username blank and password is admin,try this if you havnot changed the default password

7.Click Administration on the router setup page and under that click firmware upgrade
8. Select the file you have saved on the desktop and click upgrade.
9.After upgrade turnoff the router for 30 seconds and then turn it on

Enjoy

Regards
Chiranjeet

No. To do so would require changing the hardware, namely the motherboard. It is not a "software" upgrade.

Instead, buy a PCMCIA-to-USB2 adapter, and insert it into the PCMCIA slot in your laptop.

This card will not work in your desktop PC. This model does not support PCMCIA. You will need to get a different card for your desktop. One that supports PCI as this is the only expansion slot that you will have. (Also 1 PCIe). My recommendation would be to get a wireless G USB adapter that could easly plug in to the desktop via usb port. This way you will not have to take the case apart.

Yes call Fries Electronics let them know what model laptop you have they can tell you the type of memory you need SoDimm more then likely, they will give you a price. It is better to remove the old memory and take it with you when you go to buy it has to match. Also you can ask what is the largest recommended hard drive they have for this model laptop, probably 60gb. The motherboard for that laptop does have limitations. That laptop probably does not have a built in wireless card so you can either use a hard wire RJ45 Data cable and plug the other end into your Internet Router, or you can purchase a PCMCIA Wireless Card to insert into the slot on the side of the laptop. This PCMCIA Card will allow you to access the internet wirelessly. You have now beefed up your CPx Latitude.

upgrade the drivers of your wireless card......

Hi, what you will need is a PCMCIA wireless card or usb wireless stick, these can purchased pretty cheaply these days from the likes of ebay or your local computer shop should be able to sort you out. PCMCIA would be the one I would choose as these just slot into an empty bay and once installed, can be left there. Hope this helps, if not give me a shout and I'll see what else I can do. Si :)