So bottom line, I am not in any way limited by the
Code:
MAPP CXC article: R1GB001
thingy? And from that fact, any version of W660 firmware would work as long as you have all 3 packs matching (main,fs,cust.), the only thing that has to match with the original firmware is platform (DB2020) and CID(52).

Oh and one more question, what is GDFS in relation to main-firmware,fs-firmware and custom-pack? Does it contain one/all of them or does one of those 3 contain GDFS, or is GDFS a separate entity?

Also how does one extract fs-firmware. For example I have a FS-firmware which is not listed on this site's download page. Suppose I want to extract it and share it here, can I do that myself or are those obtained in some other way?