Well, I tried it yesterday, and it wouldn't install, as per the error message I showed a few pages back. Today, I said "what the hell" and tried it again, with the exact same method and it worked! My report. Wow, I've never been able to play Warhead in DX10 mode at 1680x1050 acceptably. Today is the first time! I got a consistent 30fps in DX10 mode on the "Adapt or Perish" level (the one with hovercraft) using "gamer" settings. Also, adding in "r_useedgeaa=1" had no impact on performance, but made the game look much nicer. This is using the x64 version of Warhead, BTW. Now, the bad news, DX9 mode no longer works AT ALL with Warhead. I tried it and the level loads fine, but you can't see anything due to the whole screen artifacting like crazy. I guess I'd prefer using DX10 instead if I can, so this isn't a huge deal, but it worries me for other DX9 things. I'll try a Vantage run and re-report.