How to unlock 2200 XP+

Exactly how do u unlock a athlon 2200 XP? And unlocking just lets u change the multiplier, rite?

Also... im getting a new comp, have any advice?

CPU:
AMD Athlon XP 2200+
Motherboard:
Gigabyte GA-7VRXP
Memory:
Crucial 3 x 512MB DDR-SDRAM, PC2700 166FSB CL2 (DDR333)
Graphics Card:
OCSystem Enhanced GeForce4 Ti4600+
Hard Drive:
2X Western Digital WD1200JB
DVD-ROM Writer:
SONY DVD+RW DRU120A $429.00
DVD-ROM Drive:
PIONEER 16X DVD-ROM 106S Slot loading
Audio Card:
Sound Blaster Audigy Platinum eX
Speakers:
Klipsch ProMedia 5.1 THX
Display:
Sony PREMIERPRO Series 24" FD Trinitron® CRT
Network:
Dlink DGE-500T Gigabit Ethernet
Mouse:
MS Intellimouse Explorer
Keyboard:
Microsoft Internet Keyboard
Case:
Coolermaster ATCS 201
Power Supply:
ENERMAX EG651P-VE(FMA) 550W
Misc:
PROII USB MULTI-SLOT CARD Reader
Iomega External USB 250MB zip
Innovatek Set2 watercooling Kit w/ flow meter and water tank