hi guys, i need your help. the pc i am workin with at the minute has a s**t cpu its a 450mhz p3. the mobo is a msi ms-6156bx. i have on my table now a ga-8simlnf rev 2.0 mobo and a 2.6ghz celeron cpu. how do i install a new mob and cpu? also at the minute my pc has a 20gig hdd as the master and a 80(which my current bios will only read 30gig of) slave hdd. when i tried to put the 80 at master the pc would not boot,but it did wen i set it to slave. how do i install the new mobo and processor and set the 80gig hdd to master to run everythng from there, while putting the 20 as slave. also is there any way i can rescue the data on my hdd. i dnt want to lose it but i fear if i format the hdd wen i install the xp disk again it will get rid?