the easiest and %100 working way is
1) unplug ide and power cables of your dvd-rom drives (no need cd drives)
2) mount using daemon tools 4 (all emulations on)
3) install
4) open the game. it asks for restart. do it
5) mount full image on daemon tools 4 - exit daemon tools from system tray but leave emulation options enabled (it asks)
6) enter game - enter your serial
7) play
8) After that, you must do this for play
-unplug dvd roms.
-mount full image (dt4).
-exit dt4-leave emulations enabled.
-enter game-PLAY!
sorry i dont know english well
EDIT: i forgot this: you should have only ONE virtual drive (dt4) while doing all of these..