I have multiple version of LabVIEW on my machine, but I was told the FIRST version of LabVIEW doesn't play nice with regular LabVIEW.
I installed the FIRST version on a virtual PC
http://www.microsoft.com/Windows/Vir...C/default.aspx
What Virtual PC is another PC on your machine. You basically have 2 computers. I use this whenever I need to install software that I need a clean install for or I am concerned it will interfere with my main setup.