I think the best way of doing it (correct me if I am wrong):
1. Unlock the phone using the Hard-SPL that was just released
2. Flash the radio with the Verizon radio (this might not be necessary as the radio should be in the leaked ROM)
3. Flash the leaked VZW rom
I am not sure how a custom rom would work, you would want to ask the dev if Verizon would work or not.
There are a bunch of tutorials on flashing, my experience is only with the Titan. There are general instruction for the flashing the Titan
http://wiki.xda-developers.com/index...itanRecentHome These techniques might or might not hold true for the Touch Pro, so keep that in mind. I would suggest writing down all the numbers they tell you to write down when flashing, ie ESN, MSID, etc... just in case something goes wrong.
Good luck and have fun!
