Debranding rogers w580i, need help!

[binnedy]

I have a few questions, im a noob with phones and dont know anything ive researched a fair amount and i just want to be sure.

1)Do i need to unlock my phone before i debrand it?

2)What would be the difference between:
W580_R6BC002_FS_AMERICA_1_RED52
and
W580_R6BC002_FS_AMERICA_2_RED52

Phone Info:

23:14:16| Profiling SEMC phone...
23:14:16| Platform: DB2020
23:14:16| OTP CID: 51
23:14:16| EROM CID: 52
23:14:16| EROM Color: Red
23:14:16| IMEI: 35923501xxxxxx
23:14:16| Phone ID: W580
23:14:16| Region: ROGERS
23:14:16| CDA: CDA102774/87 R10A
23:14:16| Firmware Version: R6BE001
23:14:16| EROM: R3A022
23:14:16| Ready for operation!

3) will this firmware work with my phone?
W580_R6BC002_MAIN_GENERIC_LA_RED52
W580_R6BC002_FS_AMERICA_1_RED52

4) what custpack would i download, there is no R6B custpack in the downloads section.
would any one of these work?
HB1-06_Gen_CDA102568_15_R8A_GENERIC_AMERICA_1
or
HB1-06_Gen_CDA102568_106_R8A_GENERIC_AMERICA_1

Thanks.