MY PSP IS VER 4.0 CAN I DOWNGRADE IT?

you cannot downgrade now you have to wait till GEN D6 comes out next year i would just sell it if i was you

It depends on which motherboard version your PSP has. If it has a compatible motherboard, you are able to downgrade and install custom firmware. You will, however, need someone with a psp already running custom firmware to create what is called a "Pandora's Battery". A guide on how to do this can be found here: http://forums.psp-hacks.com/f133/the-hack-your-psp-mega-thread-t227349/#post1084294

I hope this helped!

-Risonhighmer

how to downgrade psp 6.37 ver fw to 5.5 m33-6 without pandora battery and how work psp tool in 6.37

Hi. Unfortunately, there is no way for you to downgrade Ver 6.2. Pandora Batteries (the only known way to downgrade PSPs) do not work with the PSP-3000, and, as such, you can not downgrade it.

no.

you can downgrade your psp version. get the cfw 5.32 so that all games will be compatible.I don't know places in india so better ask someone from there.enjoy!

You can use ChickHen R2 to downgrade your PSP without a pandora battery. You need also to download the ofw ver. 5.03 and cfw 5.03 GEN-C to hack your PSP. You can find many ChickHEN R2, cfw 5.03 GEN-C and step by step instruction in the internet.

You can't; not at this time, you will have to wait until a new FW is released.

i have tried this also i dont think there is a pass for this i have tried every folder every combination and everytime it is corrupt the only way to get onto system is to downoad from ps store it has some good demos you can try also walmart it running specials on psp games some 5-10$ hope this helps you

You need to chip your PSP with Pandora's Battery and a 'Magic Memory Stick'
If you have a Fat or Slim PSP it works. If at the bottom of your PSP it says -3000 at the end, sorry but your PSP is unchippable.
After you downgrade your PSP to 'Custom Firmware' you can place ISO and CSO roms onto it.

WARNING: DOWNGRADE AND CHIP YOUR PSP AT YOUR OWN RISK. IT IS NO ADVISED BY SONY!