[Iamghey]

I have no access to power tools, what should I use if wanna have a window installed on my case?

P.S. (I do have a hand drill...)

[RobStyle]

Get some sheetmetal & a sheet of plexiglass and make a new door with the two.

Thats what I am doing with mine. Just cant bring myself to cut up the doors on my tower.
Plus this way, sheetmetal cuts easily with snips and I can make new cutouts and designs whenever I want to.

You will need something to bend the metal with such as pliers and something to cut the design with. Sheetmetal sheers are about $10.00.

With just a drill, not much to do but make a bunch of "connect the dots" holes. Cant help you there.

[Jab-tech]

If you can't use power tools use a nibbler ... Available for about $10... Takes a long time to cut but give a really good edge.