Re: STARTPOS Modding Help
Sorry, I don't know why unlocking a formerly unplayable faction does not work for you. I followed the instructions in husserlTW's guide to unlock the Thirteen Colonies, Louisiana and New Spain for my These United Colonies mod; it worked. Are you using husserlTW's guide? I can only suggest looking carefully through the instructions again, to see if there is a step which you have missed or done slightly differently from the instructions. It took me a long time to learn how to create modded pack files (which, of course, is a different type of modding with a different tool) because I had misinterpreted a single line in the instructions.
If you have been able to change the owner of a region, then you have done something which I have not managed to do - when I tried to change ownership of a region, the game crashed and I could not find out what I was doing wrong. I can only suggest sending a private message to a modder who has been able to change the ownership of regions, to see which instructions worked for them.