You're gonna want to do one of two things to find the position of the bullet hit...
You can either Ray Cast, or just move an object forward until it collides with the wall.
For the Ray Casting, I wouldn't have a clue how to do it in DBC... but, on Underwear Design's site, there are good snippets for that stuff.
For the moving of the object, simply move an object from the shooting postion forward untill it collides with the wall, when it does, use the object's 3D position to place the texture/plain.
Jess.

Team EOD :: Programmer/Logical Engineer/All-Round Nice Guy