>>188Well, the filters should be pretty cheap. I know you can get the really cheap ones for probably about a dollar or two. I'd start with that before I went too crazy.
I might either go pick up one of these filters tomorrow or Monday and give this a shot myself. If I do it, I'll post pics and the results.
On a side note, have you tried to figure out why your room is so dusty?
Also, if you're on a tight budget, you could probably get one of those 12v compressors you plug in to the cigarette lighter in your car. It's not as good as one you'd plug in to your house, but it should do the job for cleaning a PC. You'd have to spend a couple dollars on the proper air chuck, but those don't cost a lot.