copy your custom rom to your phones sd card it should be a .zip
boot into clockwork recovery by powering you phone on, and when the green android man shows up press and hold the volume down button untill small vibration then release, it should now boot into recovery.
volume buttons = up & down movements.
home button = select / ok
back button = go back
select wipe data/factory reset
select wipe cache partion
now select install .zip from sdcard
choose .zip from sdcard
navigate to you custom rom
select it and press yes
wait for it to install......... then reboot
remember... always do a full wipe before installing new roms, not after.
from clockwork recovery do the following for a full wipe
wipe/data factory reset
wipe cache partition
advanced / wipe dalvik cache
Edited by tillaz, 12 February 2012 - 05:28 AM.