Downgrade Windows 7 to Windows XP Pro (Need Help)

this is what i got when the blue screen of death came up Technical Information: Stop:0x0000007B (0xF78D2524,0x0000034,0x00000000,0x0000000)
for the pass 5 times i been getting this when im trying to delete win7 from my computer and trying to put windows xp pro sp3 on this machine

my spec
Windows 7 64bit
AMD Athlon II Quad Core Processor
6gb Memory
640gb Hard drive
Nvidia Geforce 9100