Okay, basically what I'm trying to do is tweak Austria's Grenzer unit so that it can be produced in both Croatia and Transylvania, rather than Croatia alone.

Now, from poking around in the DBE I've come to the conclusion that a unit is limited to regional production by the "Region_IDRef" column in units_tables. The Grenzer's entry in this column is "grenzers" (as opposed to something like "austria_home_regions" or "global").

Now, my problem is that I can't find a table which ties the Region_IDRef value to lists of specific regions. All I've come across in my searchings has been the region_unit_resources table, but that only seems to give a plain-speak name to each entry (so that "grenzers" becomes "Croatia").

Worst case, I'll just adjust it to open up Grenzers to the the entire Austrian homeland, but if someone knows where to find the info I'm looking for (or can enlighten me if I'm totally off-track here), then I'd definitely appreciate the help.