do I need to include the model in the pbo file I have created?
Yes.
You need to edit the model to use the new textures; if you have edited the existing textures of the model you can just change the texture paths with a very old texture swapping tool you can find at our
Editor's Depot..
Not the most sophisticated tool but with that you can change the texturepaths of ODOL models..
The other way is to 'unbinarize' the model and use texture path swap (you can find it
at OFP.info) to swap the paths on the MLOD model..
Or do it by hand in O2..
If you have created completely new textures that do not match the original textures in size (512x512 instead of 256x256) or in placement you need to re-texture the model by hand in O2.