Like DDD said you'll need the UVW-Map of a door.
All 3D objects need a UVW to apply a texture correctly.
But if your using the standard doors of Kotor , just use one of there textures, cause these reflect/ used the UVW-map.
Ofcourse the textures don't show the exact edges anymore.
So if you really must have, those edges, use a UVW-Map like DDD said :)
In Max you can easly render the UVW to a JPEG of any size, though best sizes are 256x256 px , 512x512 or 1024x1024.
If you got G-Max you'll just have to take a screenshot of the edit UVW-map window. Best advice here is to make this window as big as possible. Then paste it into Photoshop and make it fit into the sizes mentioned above.
You can then easly open this Jpeg in Photoshop, take a copy of the Layer containing the UVW map, and set its mode to Screen ( this makes all the black transparent, but the edges of the UVWmap will stay visible.
Then create another layer where you want to paint on.
Place it all like so in the layer palette :
- UVW Layer in Screen Mode
- The paint layer
- The orginale UVW map ( which will be called background or something )
And while back ago I made this tutorial about texture creating :
http://www.lucasforums.com/showthread.php?t=181976)