Possible to Dual boot Windows without loosing iatkos already installed?

Hi i have seen this guide and its what i want http://www.hackint0sh.org/f184/80904.htm

Dual boot Windows vista 7 and Iatkos v7. Im currently using iatkos v7 wthout any problem, and i have all the material needed.

My question is, If i do that will i be able to dual boot both systems without loosing my currently insalled Iatkos?

BTW is it possible to make it in separate drives?? i have a Hard drive for Iatkos, and the second one free for my Windows, will be possible?