firmware 2.0

im on FW 2.0 and some pspbrew stuff works on with the eboot and was wondering how do i know what else works with fw2.0 and also stuff run off the eboot

Some stuff that works with 2.0 is basically almost anything that isnt really advanced (most emus).
You just need the eLoader. You can get that, and choose all your homebrew easily using the Beta BrewPack! Generator. You can find it in the brew menu.

but if you dont want the eloader than thats fine!
Just get the downgrader files here:
http://www.pspbrew.com/index.php?search ... =downloads

You can get 1.5 with the downgrader, which is by far the best option. You can do anything if you have a 1.5.

yes, just downgrade, it's much better here on the dark side