Self installing OS including parallels?

Ok guys im hoping you can help me with this. The only Apple product I have is an iphone so not much experience with OSX. My aunt has a medical program that will only work with Internet Explorer. I've decided that it would probably be easier to just use Windows in a virtualized environment as opposed to bootcamp and installing the OS seperately. She lives 3,000 miles away from me, so I really need a plug and play solution.

If I buy Parallels - is there any way to create a custom installer that installs not only Parallels but also a fully working copy of windows xp with it? (of course provided that I have properly installed and configured it with a key and everything). That seems like the easiest way to do things considering that I have such little experience with OSX myself and also makes things the easiest on her end.

EDIT: I should mention I have a Hackintosh to experiment around with the situation so I can test any potential fixes as well.
EDIT2: I'm not sure of the specs of her machine unfortunately, but I do know it is a Macbook that was purchased within the last year and runs Leopard.

Any guidance or idea my way? Thanks.