Morglum, I also discovered that this also happens when I don't use IGR at all.
I play a game, exit it the "old" way via the games' menus. Go back to the EvoX dash, launch a game, and BOOM - it freezes. But only if the network cable is plugged in. But then again, I'm always FTPing and using XBMP... it's always plugged in. So unplugging it all the time's not an option.
I think I'm gonna revert back to the previous Xecutor Lite BIOS. 4976's mediacheck is one thing, but if I have to get up to restart the box after each game launch, fuhgeddaboutit! I'd rather have it work the way it did before, and patch my games by hand... at least until this is fixed.