[tobeychris]

As for the size difference, 20931 a and b are the same size which is 20mb smaller than other SYS folders. I believe the reason for this is the module folders. In 20931 you only have the bin, txt, and S00x files. In other SYS, they have all those plus the file that is created by those 3 file types.
ie: shell32.exe folder has:
imageinfo.bin
imageinfo.txt
S000
S001
S002
For a total of 310KB.
In any of the other SYS packages, shell32.exe folder has all of those files plus the actual shell32.exe file.
For a total of 614KB in 20757.

What I'm trying to say, is that we made it faster to download and compile ROMs without knowing it, and you should be happy!