How can I set this camera up to overwrite the images on the SD card?

Take the SD memory card out of the camera and with it facing you so you can read the label look on the left hand side and you will see a small slide switch. It should be UP for the card to be in read/write mode, if you switch it down the card is protected so you can read the images but not overwrite. Hope this does the trick :-)

All SD cards I have ever seen can be locked with a little slide on the left side as you face the label. if the slide is up, the card is unlocked and can be used for taking pictures. If the slide is down, it is in the locked position, which prevents it from overwriting anything that is currently on the card. Before you unlock it you may want to verify that all pictures on the card (if any) have been saved because once you start using the card and overwriting its contents, the pictures are gone forever. If the card is empty, just unlock it, format it and start taking pictures

I assume that the camera is not compatible with SDHC cards and will only work with normal SD (upto 2GB) cards.

You can connect camera's memory card to computer, then download this picture recovery program which is outstanding among all picture recovery software.
http://www.001-software.com/picture-recovery/

You need to switch the camera over to saving pictures directly onto the SD card.

• Menu
• Cam settings
• Chose AUTO or SD card option
• Press OK to SD card

Note: If the SD card isn't in the camera or is unreadable the camera will automatically go back to saving you taken pictures on the internal memory.

If you experience problems:
The lever on your SD card might be turned the wrong way so the SD card is reading protective.
Please turn the lever and try again.

The SD card might not be supported by the model: Your camera Memory card support is SD/MMC up to 2 Gigabyte and SDHC up to 8 Gigabyte

The SD card might not be faulty, try another card, since the camera could give you a message like the one you're experiencing.
Try with a different SD card that is supported by the camera.

Once you have set the settings to save onto the SD card directly you might like to transferre your existing pictures from the internal memory onto the SD card:

Question :
How do I transfer pictures from the internal memory of my KODAK Digital Camera to a memory card? Answer :
Follow these steps:

On the camera, press Review and then Menu.

Select Image Storage.

Change to Internal Memory.

In the menu listing, scroll down to Copy, and select OK.

Select a single picture, or select All.

When you have finished copying pictures, reset the Image Storage location to your original setting.

maybe you are saving pictures to your camera internal memory,if so try to change it in settings for SD card,or it could be that your camera does not accept the type of sd you are using,try any other card and see

Card locked means that the tab on the edge of the SD card has been moved to the "locked" position. This prevents deleting or overwriting anything that is on the card, and also prevents any more images being added to the card. Move the little tab to the "unlocked" position.

Take a look at this caption, it may be your setting is not correct.

On removable memory cards. Panasonic iPalm Digital Cameras are equipped with an SD Card Slot which allows the camera to store images on EITHER an MultiMediaCard (MMC) or an SD Memory Card. Simply insert an MMC or SD Card into the camera, take pictures until the card is full, then remove it or replace it with a fresh card. You can selectively erase any or all of the images from the either the MultiMediaCard or the SD Memory Card and reuse it. Storage capacity for the PV-DC3000-A (based on included 16MB SD Memory Card) SuperFine Mode* (2048x1536/low compression) up to 13 images Fine Mode (2048x1536) up to 27 images Normal/2x Digital Zoom Modes (1024x768) up to 69 images Burst Recording Mode (1024x768) up to 82 images 3x Digital Zoom Mode (640x480) up to 150 images Motion Image Recording Mode (12 sec. max./320x240) 9 sets TIFF Mode (2048x1536/no compression) 1 image Storage capacity for the PV-DC3010 (based on included 32MB SD Memory Card) SuperFine Mode* (2048x1536/low compression) up to 29 images Fine Mode (2048x1536) up to 57 images Normal/2x Digital Zoom Modes (1024x768) up to 145 images Burst Recording Mode (1024x768) up to 172 images 3x Digital Zoom Mode (640x480) up to 315 images Motion Image Recording Mode (12 sec. max./320x240) 19 sets TIFF Mode (2048x1536/no compression) 3 images

On removable memory cards. Panasonic iPalm Digital Cameras are equipped with an SD Card Slot which allows the camera to store images on EITHER an MultiMediaCard (MMC) or an SD Memory Card. Simply insert an MMC or SD Card into the camera, take pictures until the card is full, then remove it or replace it with a fresh card. You can selectively erase any or all of the images from the either the MultiMediaCard or the SD Memory Card and reuse it. Storage capacity for the PV-DC3000-A (based on included 16MB SD Memory Card) SuperFine Mode* (2048x1536/low compression) up to 13 images Fine Mode (2048x1536) up to 27 images Normal/2x Digital Zoom Modes (1024x768) up to 69 images Burst Recording Mode (1024x768) up to 82 images 3x Digital Zoom Mode (640x480) up to 150 images Motion Image Recording Mode (12 sec. max./320x240) 9 sets TIFF Mode (2048x1536/no compression) 1 image Storage capacity for the PV-DC3010 (based on included 32MB SD Memory Card) SuperFine Mode* (2048x1536/low compression) up to 29 images Fine Mode (2048x1536) up to 57 images Normal/2x Digital Zoom Modes (1024x768) up to 145 images Burst Recording Mode (1024x768) up to 172 images 3x Digital Zoom Mode (640x480) up to 315 images Motion Image Recording Mode (12 sec. max./320x240) 19 sets TIFF Mode (2048x1536/no compression) 3 images