Multiple versions Allowed?

I've got XP Pro, MS office 2002 which runs VB6.3
My son in H.S. just started taking VB5 classes
I took VB5 a few years ago, and have VB5 Professional edition I'd installed on another computer, long gone.
I used it for a class, but never went much further, so I'm no VB Pro.

So, can I install VB5 "seperately", or will it mess up windows or the office version?
Will the install be smart enough not to overwrite newer pieces?
I tried loading some old projects
(.frm files?), well "import" was what was available in excel, for instance, and was told "The form class in (my frm) is not supported in VBE. the file can't be loaded"

Welcome to the forums. :)

Office apps have VBA or Visual Basic for Applications. This is a different product then all versions of VB (VB 1 to VB 9).
You should be able to install VB5 with not issues since its a separate product. You can not use .frm files in VBA, only .bas and .cls. :)