1. yes you should back-up the gdfs that is all you need to back-up.

2. you have download 2 filesystems you only need one, you also need a main in .mbn format.

3. choose a w660 custpack

4. CXC1250913 R6BC002 070607- that just shows your current firmware version which is R6BC002, post up a xs++ log that will have your cda it in.