guys my friend has an HP desktop. his config is Celeron D 2.0 Ghz 256 mb RAM intel 865 chipset. the warranty on the desktop has run out, so he wants to add an agp slot to the mobo. the motherboard has markings (a space with lined silver dots) wherin u it appears that he can fit an agp slot. ( there is 'agp' written on that space which has got the markings) can u just solder an AGP slot at that position??? will it actually work or does he have to upgrade/change his BIOS??