hi adam, welcome to this forums.
1)when you start buldozer do you get any errors (about can load a texture or something)
2)what is your model texture paths?
try this for start, on your left you should have the resource library, if not hit shifht+F10 in order to appear.
This library has icons like a stack of books. Using the '+' on the left of that books, expand the Current Lod->textures now you should get a lst with your applied textures, if not then probably you haven't map the textures correctly, if you get a '?' at the left of each texture name then you have missing textures, probably from wrong paths or something, but if you have a green rectangle box the everything it's ok.
3)now suppose the you know that OFP/Arma use textures of power of ^2 that means that all your textures must comply under this pattern, an example could be 1024X256, 1024 X1024 etc..., if not then probably you could get a bunch of problems. Also use TGA 32bit, for source file, and try not to let O2 to create the paa automatically, but 1st use TexVie2 to create from your source (TGA, jpg) into paa, and then load map your paa's on your model.
That's it for now check all these things and tell me the results, then we can move to the next step.