I think your asking us for help in area's you can't help.
We can't give you more LEGO's, thats a problem you may have to work around on your own. If you have a mac and can only find instructions for a PC then again, we can't change that fact. In my experiences, mac's have always been great video editors, so I don't see why this is a problem.
Lighting would probably be bset by a bright window, free natuarl light is the most convinient, and you apparently have some LEGO's, could you build your own ship? If not, maybe to a film without a ship, I've seen some great films that are just a few fig's moving within a small area.