IaPuP is right
it's very hard to cut the bridges
only a few people who has good tools can do it
so we usally choose soldering on mobo instead of cutting the bridges
there r three ways to oc amd cpu
(1) using mobo supporting multiply adjustment like ASUS or ABIT (very easy)
(2) soldering on cheap mobo like MSI k7T (i feel easy but others doesnt)
(3) conneting n cutting the bridges (very hard)
there is a good guide to modify the bridges
www.tomshardware.com