New questions (i think) about unbranding

[detonator]

I've looked at this forum for answers to some of my questions, but I haven't had any luck.

Here are my questions:

1.What is the difference in the R8BA024_RED52, R8BE001_RED52 & the R6BA020_RED52 and so on? I understand that they are different versions of the firmware. But does it matter which one I use?

2. I understand that people who use the internet and MMS on there phones have to go to the Sony Ericsson site to get the settings for those things. I do not use MMS, Internet or anything like that on my phone, yet. So after rebranding, will I need to do anything like that? I have read a lot of people having a "Configuration Error" when they turn on the phone. I want to try and avoid that.

3. What are the Custom Packs? And what are the differences in them i.e., HB1-06_Gen_CDA102568_106_R8A_GENERIC_AMERICA_1 & Laura_i_CDA102774_20_R1A_Generic_Trade_USA

4. XS++ or SE Tool Lite? Which is better?

5. One final question. Like I said earlier, I don't use internet on my phone yet. But if I want to later will flashing my phone to the Sony Ericsson firmware cause me to not be able to use Pandora internet radio. http://www.pandora.com/att This is my only concern.

6. What's the difference between flashing and patching?

I appreciate you taking the time to read this and answer my questions.