On the back of your case you'll see screws around the outside holding the case in place, unscrew the ones keeping the right side together (looking at the back) and remove the side panel.
As for the BIOS, it should tell you how to enter setup on the first screen when you boot up either press F4 or delete. And don't pull on the front of the case, there are usually screws and mounts hold it to the chassis that you need to release from the inside of the case.
EVGA 680i SLi
E6400 @ 3.0 GHz
4 GB OCZ Platinum Rev. 2 EL @ 880
400GB + 250GB Seagate Barracuda SATA2
Antec P180B Case