I didn't think it would work, but it's possible to host an AH H2H room and run AH2 at the same time on one computer

Nobody even complained about warping in the H2H room, but framerates and FE responsiveness was a bit sluggish in AH2. I still saw 25 fps at 1024x768 in AH2, which was suprisingly high.
I'm only on a GF4-4200 and Athlon XP 2000+ with 512 meg ram running winXP home, and it still worked. I wonder how it would run on a faster system... In any case, it's nice to know that the game is well behaved enough to do that even if it's not a very useful trick.