By the way, the minimum for a working mod folder is:
data/text/imperial_campaign_regions_and_settlement_names.txt
data/world/maps/campaign/imperial_campaign
data/world/maps/base

This can be run through the BI.exe as well, and it will just start vanilla RTW
Utilizing this is also a good method for testing things as traits, etc. before you put them in your mod for real ;)