I found a possible hack for the PSP on the Internet that said that you can still boot up 2.0 Homebrew on any PSP Firmware Version by converting .tif or .tiff Homebrews to JPEG, GIF, or PNG and booting them up the old way in Photo.
I found a free graphics converter here which does this. Click on the previous link to read about it.
Download the installer here.
Is this true?