FWIW, I am on AT&T.
I am using radio version 1.14.25.35 and I didn't mess with the RIL file at all.
I'll look through the .provxml files later, over the next couple of days, as I get some free time off work. But I'm not exactly sure what I'll be looking for. Maybe it will be obvious.
Also, I'll try the SYS pack suggestion and let you know if that changed anything.
As far as my kitchen goes, I am simply using the "WWE Visual Kitchen 6.1, OEM: 5.12.206.1 (20779), SYS: 21055, ROM: 21056/20779, 158 MB, 17.01.2010" kitchen that you posted in the first message plus all (five now) package files. I haven't done any file editing at all, so I'm not sure how much it would help to RAR all of that up for you since it's basically an exact copy of what you put up. But I will do it if you still think it could be helpful.