The etching, from what I understand from my backround in engineering, is that the design/drawing/image is punched into a computer and a laser is shot onto the piece of plexi. The heat applied turns the plexi opaqe. Since you can get a lazer to a very fine point, you can do much more detailed images and drawings.
As far as the jumpers...I've checked the jumpers on all my drives, both CD and Hard Disk. I haven't touched the jumpers on the mobo, because they should all be placed and ready to go. I'll double check before I disassemble it, but I'm 99% sure my jumpers are all correct, simply because I tried booting up with just one harddrive and one CD drive, both jumpers on master, and the right IDE plug interface in each.
Like I said, I'll double check. I'm not a PC expert by any means, this really is my first attempt at building a computer, but I do understand the factors involved and I think I got it right. I'll just dig into the Mobo manual again and make sure I have it all set right.