Only versions 1.0 and 1.5 firmware PSPs can run homebrew. 2.00 firmware version can run partial homebrew in userspace (most homebrew requires more than 64kb of memory).
Can I downgrade my 2.00 PSP?:
Yes. Check out http://www.pspupdates.com/ for more information. Files will not be provided here.
Can I downgrade my 1.51, 1.52, 2.01 or 2.50 PSP?:
Yes, yes and no. 1.51 and 1.52 will have to be upgraded to 2.00 then downgraded to 1.50. Version 2.01/2.50 is currently not downgradable.
What movie files can the PSP play?:
Specially encoded MP4 files. Use PSPVideo9. Firmware 2.00+ support H.264 hi-res. Earlier version firmware does not.
Version 2.00 firmware has a web browser built in. Wipeout Pure has a browser. Search more on this on http://www.pspupdates.com/. There is also a homebrew browser in the works.
Downloading PSP games for free?:
Yes, it can be done, just like XBOX, PS2, PC, etc. No links or tutorials will be found here.
All homebrew applications can be found at http://files.pspupdates.qj.net/.
Edited by Scott, 13 October 2005 - 12:43 PM.