BEFORE YOU DO THIS MAKE SURE YOU HAVE A BACK UP!!!!!!!!!!!! Flash what ever rom you would like and immediately flash a kernal over top of that rom FOR YOUR DEVICE!!!!!!! I have done this with several roms not compatible for my tmo including Verizon international and att and rom. If you use a rom with an aroma installer DONT CHECK REBOOT NOW FLASH YOUR KERNAL OVER TOP OF ROM!!! ANY OTHER WAY AND YOU WILL BRICK.
i have had great luck using trwp recovery to do this hope this helps. Also make sure you have titanium backupor something like it to remove what is not needed, also you may lose features doing this, and one more thing please make sure you know the programming code for your data setting to make sure you can switch the rom to evdo sprints 4g data. It may also be verizons code im not sure