If you read the forums and use the search ability you will know how to do it. So i am going to be brief
Once your device is rooted and your familar with the recovery flashing from sd method you need apps2sd (http://www.megaupload.com/?d=QKTUKHEM
) copy this to your sd, wipe and flash like you would if your rooting.
Restart your phone
then when it boots back up keep the volume down held and you will see a hboot screen, then go to recovery (like you did when rooting) use the recovery.bat then you partition your sd card SWAP=0 and EXT2=512 then select ext2 to 3 then reboot and your done.
please read the check to see if installed thread for more info.
Rooting DOES NOT void your warranty if you are in the EU!