So is there a way to fix this when i installed a addon pack the defiance pack to be exact, everytime i try to get in all it says something like this car is not registered or validated but most likely isnt in the xre registry. Anyone have any suggestions.

Just answered on the other page lol, simple answer is only the last car pack loaded will register, but will stay registered from that point on in the game. In the beta stage you have to approach them, but once I start assembling the more final version either the pack will register on game load, or ill have figured out how to bypass the problem entirely

Thanks!!

glad to help

So then is there any way to fix it?

The way Mattell describes it it sounds like a load order. I've had extensive playtime with xre to know it needs to be the modt bottom of bottom mods, directly beneath the plugin you want the directory to load.