Website Testing Server - OSX+Parallels+XAMPP= How?

Hi,
I'm on my 3rd day of trying to figure this out.

I want to have one master install of Xampp on OSX as the host main OS
and have WinXp & Win7 virtual machines(Parallels) installed
that can test the different versions of internet explorer(ie6, ie7, ie8).
I want to be able to do this while working offline - Can this be done with Parallels?

All explanations, links to tutorials or even other non-Parallels ways of doing this are all much appreciated

Cheers
Phil