I loaded up HL2 with this, it's the only game I've tested so far that actually loads the DLL correctly. I can toogle the overlay menu and I've gotten one of the menu screens to look somewhat OK. After loading into Route Canal or Sandtraps, it's pitch black, aside from the weapon and the buggy. Spent like half an hour messing with the settings but I couldn't get it to work well.
NFS:U2 and GTA:SA do not start at all with the DLL present.