Go here:
Olipro->Creations(&Unlockers); - RhodiumW Hard-SPL
There will be a link to this as well as some directions:
http://hpcmonex.net/htc/rhodw/Rhodiu...R3_100HSPL.zip
Basically all you have to do is connect to your phone, use that program to unlock it. Then you can use any of these roms using the RUU (Rom Update Utility). If you ever have to take it back to the store then you install the stock ROM (Sprint, Verizon, Telus, etc.) and RELOCK the phone using a RELOCKER.