I'm new to this forum, but bear with me.
PSP 2.0 cannot run homebrews as yet, and I have a 2.0 PSP...which makes me a very depressed little person.
However, I have faith in everyone who's hacking away, trying various folder swaps, exploits, anything that'll get through the sony barriers.
One avenue that seems to be ignored in these forums is what makes certain memory stick eboot files accepted by the 2.0 PSP (updates), the sony signature.
Maybe now that sony has most probably removed any way of using folders to get past the 'corrupt data' message, maybe those geniuses on these forums could concentrate on what makes the sony signature.
I'm sure someone will shout abuse at this, and scream at me for not helping, but an idea is an idea, and as yet noone (to my knowledge, after a lot of searching) has identified exactly what makes up the sony signature...so maybe that will be the holy grail to homebrews on a 2.0 PSP.