Alright. I got the motherboard off of the tray, by clipping off the plastic at the bottom of the heatsink mounting brackets. This required purchasing a new mounting bracket, which I now have installed, along with a new heatsink and cpu fan. Once the mobo, sans tray, fit into the case, only one of its holes matched up with the holes in the case (Antec SLK3000B)... so I screwed that one in, marked the other three, and drilled three new holes into the case. Miraculously, these were accurate enough to get the motherboard mounted in its new home.
As of right now, I have everything together except the front panel connections. If anyone is doing a similar thing and needs some help, you can send me an IM (thespoon87) or email (ch.martin@gmail.com) and I'll try to assist.
My problem is now the same as MrNaPaLm32's. #1, not really knowing how to physically connect the wires, but more importantly #2, having no idea which pins do what.
