The suggestion was before I tried installing Windows 10. So after trying last night, it appeared that the previous version of Windows was untouched and depending on the circumstances, even the boot loader remained untouched on the previous Windows install. My partition on both virtual drive was one solid partition. I haven't been able to test all variables, as it was brief, and I could not see any apparent changes in the previous OS install. It is still his call on how to proceed. In the event if Windows 10 or 7 is not added to the list, it is easy to add it to the BCD store if need be. Also your idea is sound, it makes easier to tell which partition is which.
Sadly with Windows 10, it cannot even fully utilize my computer, not because of lack of drivers, but the lack of resource access that Windows 10 cannot even access. I need a Windows Server version to fully utilize my computer.
Edit: I forgot to mention that back in the old days, one must hide the OS when attempting to install another one on the same computer. Guess that not needed today.