c'mon, I have a P4 1.6 Ghz, 256 SDRAM, 128mb FX5200 & i was able to play that game....not very smoothly,but playable
Just apply the patch 1.02....i think
from the config app, select shader model 1 (or something like that)
open the game, disable post effect & shadows <==VERY IMPORTANT & exit tha game
open hitman.ini (config file) & change resolution to 640x480 manually...
after that Hitman shud start @ 640 with decent frames
VERY IMPORTANT: DO NOT GO INTO HITMAN GFX OPTIONS AFTER DOING THIS. IF U DO, THE GAME WILL REVERT TO 800X600 & U WILL HAVE TO REPEAT THE STEPS AGAIN.(sorry 4 tha caps)
thats my method & it worked 4 me