Using WM IS/Modeler 4.6/6.1 on Windows VW

We are currently running Wm 4.6 and 6.1 IS with Modeler. We use this as a sandbox for client support. We want to upgrade the OS and put each WM instance in it’s own VM.

Does anybody have any experiences with this? Any pitfalls I should be aware of before attempting this type of install?

Thanks in Advance