Hardware Related Crashes

i haave been agonizing over this for a while. My comp overheats/crashs/freezes abnormally and I think its my hardware. i have cheeked my temps and they seem pretty average at 89-110 and in attition i have a fan outside of my comp cooling the room.
here are some stats i got from everest home edition
Motherboard:
CPU Type Intel Celeron D 320, 2400 MHz (18 x 133)
Motherboard Name Intel D845GVFN (3 PCI, 2 DDR DIMM, Audio, Video)
Motherboard Chipset Intel Brookdale-G i845GV
System Memory 253 MB (PC3200 DDR SDRAM)
BIOS Type AMI (11/02/04)
Communication Port Communications Port (COM1)
Communication Port Printer Port (LPT1)


At first i thoght my comp was overheating so i opened the case. Next I thought it was sensative to vicration so i moved it too the floor. No results so finally Ikept looking for something wrong. Im not too computer savy but I found this

i have a pic of another computer i found that i hope i can use to explain. Iam not so computer savy or fimiliar with the parts so i am sorry if i am extremly noobish or confusing.

http://img97.imageshack.us/img97/540/compwebw4.png

Okay the "greyish film like stuff" connecting my floppy drive to that "brown flat board" lighted in pink is ripped in 3 places at once at where those black lines are but still one whole meeting up on both ends. Think blood vessels. I was wondering if that is causing my problems and what that brown board and grey strip is...

thanks in advance