Is it possible to save the FS and Main of a K770i, CID53

I have a K770i CID53 and want to debrand it in a few days. This isn't the problem.

My questions is:
If I want to take the branded Main and FS back to the phone (it has a o2 Germany Branding)
I need both files. I don't have them now.
Is it possible to extract both files from my cellphone?
At the moment it has the branded firmware.

Do I need both files (FS and Main) to rebrand ist or do I need only the FS file?

Hope the topsony members would help me :)

I think you can but it is a little bit complicated.
http://www.topsony.com/forum/fs-file...file-t890.html

And you can't extract / backup the banded firmware now , since it is overwritten by the newer firmware.

I have a K770i I want to patch it using SeTool2 lite, but the problem is that I am unable to extract the main file from raw. The SEFStool by darkmen seems to always hangs, Please help. :(