After a few months of sporadically tweaking, I feel my 900 is about done. I've never modded cases so I just used creativity.
My 900 isn't modded, I just tried to make the best use of the holes that were already there. Just to show you can have pretty neat cable management on an original 900! Thanks for the ideas everyone and sorry for the bad quality pictures.
Here you see my back side. It shows my (lack of) cable management. Since the case closes easily, I didn't really put more effort in it.
http://img204.imageshack.us/img204/8...0068du2.th.jpg
Here are the insides of the case. As you can see I installed 2 CCFL bars (the other one is in the ceiling of the case) and put another fan on the drive cage in the inside.
http://img518.imageshack.us/img518/4...0069dr4.th.jpg
Here you see the CCFL inverter and the way I used the zip ties to fasten the fan. Thanks for this idea to the guy a few posts above me!
http://img518.imageshack.us/img518/9...0070ct2.th.jpg
And here is the result in action.
http://img60.imageshack.us/img60/313...0072sd3.th.jpg