I think I can call this version 1.00 of the index. It has over 100 nations from the full depth of the forum in it.
Next I'll work on a slightly more user-friendly version of the sheet, as some of the mods with chopped-up batches of unit IDs can probably be made simpler to look at. It'll be a bit of an incremental change (and probably a small increment), but it's a start.
I have a quite impressive collection of old zipped mod files now
And on the very last page of the forum I read an interesting discussion on what a biblically themed nation mod might include.