DIY PC lighting steps?

[Twisted-1]

How would I go about modifying my Light fixture to house PC lights. I see alot of modded fixtures but no instructions on how.
So what all do I have to do and how?
What type of ballasts and wiring steps do I need to take and how do I set up a reflector?
What materials should I use?
It is only to house 1 or 2 , 21 inch 65 watts buld. So I am not to concerned about heat. Also what alternatives could I do instead?

Step by step instructions would be great. Thanx