Is it possible to make a multigame disc with EvoX as the root menu? MenuX is too buggy and MXM takes too long to load up? Would EvoX work?

Yes. In your evox.ini, just have a link to the game for the menu.

For example..

Item "SSX 3","D:SSX 3default.xbe"

I would think AutoAddItem would work if you just changed the path to the D: Drive.. but with a manual and correct item line, you would have no worries.

BTW, it is best just to put BoXplorer on the DVD too. Just in case a manual line, like the one I did, is wrong.

I use Evox for all my multi game discs. It's simple and guaranteed to work.

Like shanafan said, just insert manual lines for each game is probably the safest bet. You can always burn it to a DVDRW to make sure it works before burning to a DVDR.