BIOS disability will do the work, even if u dont, and install the AGP card into slot, that will work for you as well, but it may bring danger of driver conflict.
btw, who told you that you'll have to unscrew it out? as if that person telling u that thing have same board, try on his, as if it'll work, let me know as well. HAHAHA.
Intel Core2Quad 2.66Ghz 12MB L2-Cache
4096MB DDR Kingston Hyper-X
XFX 9600GT AlphaDog
Seagate 2 X 320GB SATA2
LG L246WH Flatron 24"