hmm, u mean, you got the hard drive from your cousin? isnt it?
does your PC has got the COA attached? as if its there, you can use any of the CD-Writed copy and thereafter putting ur own COA
Intel Core2Quad 2.66Ghz 12MB L2-Cache
4096MB DDR Kingston Hyper-X
XFX 9600GT AlphaDog
Seagate 2 X 320GB SATA2
LG L246WH Flatron 24"