I was thinking about how the xbox software exploits and softmods work, such as "Phoenix Bios Loader" where you could temporarily load up another bios off of the hard drive/memory card and not the motherboard. I was wondering if it would be possible to make a homebrew psp app to execute the 2.0 firmware update and trick it into installing it onto the memorystick and not flash the psp itself. Then have the app load up the 2.0 firmware "virtually" whenever you want. That way we could enjoy the features of 2.0 and possibly even play the newer releases that force you to update. And if you want to go back to homebrew again, just restart your psp to make it boot back up to it's 1.5 state, and if you want to go back to 2.0, just launch the "virtual 2.0 app" in your list of programs! Sound like this could be possible?