Hi Bullet
I got windows 7 it will batch change names only not extentions witch will be a problem for me as I wanted to do layer rendering say a normal render of 200 frames with rendering layer would be 1200 frames to change. The problem is with only this scene, I did try to export parts out but the problem remained with the parts. I was thinking on the lines of bropping a bomb, if you notice each bomb has 4 jets at the end of the fins these would light up after dropping..................dave