Last night i was up half the night trying to find out how i could send a song from a 1.50 psp to a 2.80 psp, until i had an idea. If you go to any firmware's save data utility and select and data by pressing triangle, you'll see the word "Copy".
So I went on my 1.50 and to Fileasisstant++ And copyed an MP3 Song into a savedata file and went ahead any copied it. Everything worked perfect, copied fine. So, then, i had successfully copied a song (or you could use any sort of file) from any firmware to any firmware.
This could come in useful, as there is loads of times when my brother has been asking me to put a video on his psp, ect. and we weren't near a computer at the time, so i just find it to be useful.
So, here comes my question; did we already know this sort of thing can be done? (copying all types of files between firmwares)