jailbreak / Unlock phone bought in Thailand

[normj]

Hi, I have a 2g phone which I bought from new in Thailand which was Jb and unlocked to fw v1.1.4 where i bought it from and is running fine on Tmobile.
I would now like to upgrade the firmware to 2.03. Should I run in to problems, and wish to restore, what would be required to get it back to its original state and then re- jb / unlock from there?
When I winpwn it I'm not sure which file I should use (5a347 or 5b108)?

Any other advice woul also be appreciated

bump

[461am]

It's firmware 2.0.1, and you'll be using 5B108.
If you're phone doesn't end up working properly, just do a simple restore from itunes and start over.

[normj]

Followed that and I'm now sorted thanks very much, although I had to increase partition size to 800mb, maybe i could have made it smaller, but just wanted to be on the safe side.