Can TP2 be flashed before activation?

[rsmith0318]

I was lucky to get my friend who is a manager at my local Verizon store to warranty my 6800 for a TP2. I have been reading multiple post on flashing ROMs & I believe I have settled on Mighty Mikes. I have a few questions regarding the flash process.

1) Can I flash the ROM before I actually activate the phone? I need my 6800 for tethering the internet on my PC when unlocking the TP2. Can I unlock it, then activate it, then flash it? Will I need the internet for the flash (I already have the ROM downloaded to my PC)?

2) Do I have to unlock the phone & the SIM card for the Flash? What is the benefit of unlocking the SIM?

3) Does the current version of MightyRom have the latest update & does it include a Radio flash as well? Where can I find the VZ specific carrier cab?

I am a noob & this will be my first flash. Please don't tell me to use the search, I have read all over & still I do not feel 100% certain of the exact way to perform the flash. Any advice would be appreciated. I don't want to end up with a brick.

Thanks,
R.Smith