Hi I'm just wondering if the bush spira D5 5.5 is an upgrade to the spira D3 5.5 and is the prossesor an upgraded version also thank you

Surely this is a question for Hitachi customer support to answer?

Copy just the AD3_0202.BIN file to the top level of a formatted CF card. Insert the card and select Firmware from the Setup menu.

Repeat the process using just the BD3_0202.BIN file.

Full instructions are here.

upgrading/downgrading or installing CFW in PSP is a risky business. the rule of thumb is to know if you have hackable or unhackable motherboard. if you had 5.03 chickhen before, then most likely you have a PSP-3000 or PSP-2000 v3 which has unhackable motherboard. you should have just installed 5.03 Gen-C or CFW Enabler 3.70, or upgraded the OFW to 6.20 and installed 6.20 TN-E or 6.20 PRO-B. 5.50 Gen-D3 is for hackable motherboards like PSP-1000 or early versions of PSP-2000. you have bricked your PSP!!!

for more details, check out sites like pspslimhacks.com, pspcustomfirmware.com or qj.net.

Hey there.
Before updating to 5.50 Gen-D3 (which is a higher version than yours), try knowing your PSP MoBo first. Why? Because, you may brick your PSP with the upgrade. Use PSPident to do that. Here's a link for that (MONSTER here!!!). Don't mind the monster, I just thought it's kinda nice doin' that. LOL
Now, do that PSPident in your PSP. If your MoBo appear to be TA088v3, DO NOT (never ever) upgrade to 5.50 Gen-D3 or you will have your PSP dead... If your MoBo is LOWER than TA088v3 (like, say, TA085v1 or v2) then go on with the 5.50 Gen-D3.
If upgrading doesn't solve your problem with playing homebrew, you may have downloaded a corrupted ISO or CSO file... Find a new torrent for that game again...
Happy playing...

Hi,
Your PSP is got problem when your upgrade it to gen-d3. Kindly return it back to your previous software. There are so many consumers get the same problem with you.
Regards

http://pspcustomfirmware.com/features/psp-custom-firmware-5-50-gen-d3-psp-cfw-5-50gen-d3.htm
this is the latest upgrade

Before you jump in and upgrade make sure your computer system is 64 bit ready otherwise it wont work at all....upgrading memory is never a bad thing will actually speed up things from running and will have a better response time....windows 7 does not require 64 bit but it desired if possible....