From my side it was like that: downloaded the mod via torrent, installed with original GTL game, all other cars work fine.
From server's side I don't know, but I assume it was done in the same way.
Can you send me original Pontiac hdv files via email? Put it on [email protected] please. I must compare these files and find the solution.
Has anybody the same problem? Finally, can you try to join our server? IP 22.214.171.124:5000