You are using 2 different Windows install disks, right? There are even more complications if you are trying to install the exact same software with the exact same serial numbers 2 different places at the same time.
Honestly, what you are trying is overly complicated for no good reason. Can you imagine the complications that are going to arise from running the exact same OS in 2 different places on the same system? Driver updates, Windows updates, just to mention a few are going to become a mess.