Hello guys, so for the past few hrs I bin trying to work on getting the NFS 1.2 version to work on OS Win 8.1 Daemon tools did not work because well the game installs but for some reason it still asks for the CD even if you have the game mounted but, I found a solve for that issue :) at least for my self I used a program called WinCDEmu, its like Daemon tools but free, and it actually for some reason supports 8.1 I mounted the ISO using that program and it didnt ask for the cd when I launched the game it worked! So yea if anyone has any more questions just let me know ;P

You probably didn't enable copy protection emulation in daemon tools.