You said you bought a new CPU.. Did you get a whole new computer??
If so then doing what my esteemed colleague has suggested will work very well. However, if all you got was a chip, you'll need to borrow someones HD to get your system to boot in order to copy the stuff over...
If you do post it as a slave to another HD, and you still can't get into it, then, with the exception of some serious data recovery programs (read serious as expensive) you aren't getting anything off of it.
Thermaltake Xaser II A5000C (w/ 5 case fans)
AMD 2500+ (OCed to 3200+)
Asus A7N8X Deluxe
1 Gig Corsair XMS low latency pc3200
2x 80g Maxtor SATA (w/ Raid 0)
128Mb Nvidia GeForce FX 5700 Ultra
480w Thermaltake PSU
Video Capture Card (titantv.com ROCKS!)
16 Sony DVD Rom
52x/32x/52x Optorite CDRW