If that doesn't suit your needs you could try these links:
COLD by RUCCUS (me) --
http://forum.thegamecreators.com/?m=forum_view&t=56416&b=6
Kensupens Collision Code --
http://forum.thegamecreators.com/?m=forum_view&t=10315&b=6
G-Man and Lost In Thought's Collision Code --
http://forum.thegamecreators.com/?m=forum_view&t=45212&b=6
Or try searching the forums for yourself to find Sparky's Collision dll and the Newton Collision process.
<Edit> I think only Kensupen's collision code works for DBC unless G-man and Lost in Thought updated theirs, Im working on mine to be compatible for dbc. You could just get the expansion pack for dbc.
Current Projects: SHADE - Game Maker | Mecho - TGC Puzzle Entry | Halo Physics Engine | COLD - Polygonal Collision Detection