Yes those files will work, to patch you will need GENERIC firmwire. And after reading what you just said I think debranding is what you want, debranding is getting rid of your operator logo on your phone.
Which you can simply do by using XS++:
XS++ 3.1 Guide-Flashing,Customizing,Recovering - Top Sony Forums
Flash the MAIN and FS and the custom pack.

The:
Remove SIM-lock patch generator - Top Sony Forums
Is a to patch unlock your phone, which means if your phone is updated it will get rid of the patch.