UK Counties (do I need to add to xml?)

Hi, my setup is:
CB:1.9.1
CB Subs: 3.0.0

My question is that I am setting up CBsubs for the UK, and looking at the edit.front.invoice.xml, I dont see any reference to the UK counties (and running into some challenges when invoice is generated as the 'counties' in comprofiler_provinces are different (actually they are not correct as they list towns as counties etc)

My question forms 2 parts:

1. Do I need to add desired UK counties to edit.front.invoice.xml? (Currently on US, Canada and Australia are there)
2. Can I import correct counties into the comprofiler_provinces, or will that create issues? (Obviously I will also import correct province_iso_code, country_iso_code2, province_name, province_title

Any help on this GREATLY appreciated.

Do I need to add desired UK counties to edit.front.invoice.xml? (Currently on US, Canada and Australia are there)

You can if you want to, but that file will get replaced when you update CBSubs so be sure to have a backup of your modifications.

Can I import correct counties into the comprofiler_provinces, or will that create issues? (Obviously I will also import correct province_iso_code, country_iso_code2, province_name, province_title

You should be able to as I don't believe CBSubs will override those tables for new rows.