it seems that in some cases there is no way to bypass this SF problem... I even reinstalled my windows to test this matter on a fresh install - the problem remains... I have nForce 3 motherboard, use DT 4.03... I've physicaly unpluged my DVD drive... I've tried different versions of sfcure, sfnightmare, starfuck, sd4hide and lot's of other programs... I followed different instructions from dozens of forums... nothing helps... the damn thing scans my image for several minutes and then states that my cdkey is wrong (allthough if I use the wrong one SF tells it right away)...
the only thing that I didn't try sofar is to shoot myself...

that might help solve few other matters...