I have just finished part 7, which shows the beginning of the convoy approach. However, that took over half the length of the strip in Movie Maker and I'm not sure I would be able to fit the attack in it as well, so I intend to do the actual attack on the convoy as part 8.
Hmm, I had something else I wanted to say, but I forgot. Stupid me.
Additional:
I remember what it was now. My list of music I have and will use for the entire 8 parts is extensive and I don't know if Windows Movie Maker will be able to list them all.