>Is there any writeup on the contents of these fields as they relate to the first record of the FRX file? The info in the FILESPEC folder in VFP6 doesn't really give any helpful info for my problem.

An appendix at the back of one of the FPW manuals had a writeup of the structures of FRX, SCX, MNX files, etc. It might not be as detailed as your question asks for, it's similar to the VFP6 FILESPEC documentation. Did you already look there? (Do you have them?)

Good luck.