Gamejack's Game starter

Hi, i just want to ask a quick noob question…
This feature of gamejack, is basically a universal no-cd patch for games??
I was wondering if i could achieve the same effect by having a virtual drive with the image of the cd and applying the corresponding protection emulation (In that case i would need an image with RMPS data right?, im talking about securom 5.1 I think… Kohan II)

Thanx in advance