@ Nicram. Are you sure you installed this pack in a clean installation of TDU ?
After you have installed the stock game (1.66A and Megapack), you must install the Patch 1.68b and Project Paradise. Also the BNK1.Map included in that community megapack must replace the one in .../Atari/Test Drive Unlimited/Euro/Bnk and same for the DB file who must go in ...Euro/Bnk/Database. If you playing the game as another language like for example Italian, Rename "DB_US" in "DB_IT". I don't know what DB correspond to the Polish Databse.
MAKE SURE TO BACKUP THE FILES GUYS !
That's the way I've installed this pack. it works perfect for me. You just can't modify cars at the moment with TDUPE. But with JPTH's TDUMT update you can use TDU Modding Tools.
I'm very concern to see people downloading the pack and then come back complaining of a problem without saying any "Thank you"
So much respect honestly... Yes it's not perfect but you guys have to know civicman spend so much time behind that work and it's just sad to see not a single "Thank you" since it's release...
@Civicman, Can we help you for the installer ? What's your issues with it ?