Hey if you were using lightwave you could use DFusion
Anyway; no, there should be nothing against using Premiere or iMovie or ...WMM to compile your movie as long as it comes through in the right format heh. Which I believe this year is .mov??? I don't even know heh.
And yea, textures = whatever application ya have handy. If you don't have a high end app like Photoshop or Paintshop Pro or Aura(for us lightwave folk
) then pick up a copy of The GiMP which in my opinion is overall better than photoshop heh.
http://www.gimp.org/