[drewcam888]

Question #1 - Yes the old verizon rom you roll back with is not gps compatible.

Question #2 - You only have to do this to enable gps on a custom rom. If you want agps with a verizon rom then no rollback is needed.

Question #3 - Relock is removed with pri change.

Question #4 - Again downgrading is only necessary if you want gps on a custom rom. If you have MR1/2 then just follow the instruction on the wiki for MR1/2. Remember that if you have done many changes already it is better to start with a had reset to remove any changes you already made.

Question #5 - After downgrading you must go straight to a custom rom. Again downgrading only needed for custom rom.

Question #6 - Just apply fix to a clean MR1/2 phone from wiki.