here's the short list of files that are changed (only 9):

coredll-dll.sig
DialParser.dll
initdb.ini
mxip_misc_100.rgu
nk.exe
nk-exe.sig
rilgsm.dll
UnlockAP (this is new, it's missing from my ROM)
YMB.exe

I wonder what each one does...

I think if we can repack it back with the unlocked rilgsm.dll should work. Enough discoveries for today though, next time.

Upgrading to WM2003SE, now that'll be more fun...