Thanks, I've got a long way to go before I can even attempt it though so if anyone does try it would be great if you could post about it. Well I've got to go and do a lot of learning.

PS - oh I've another idea if anyone's interested, if it is possible to make a model or part of a model transparent you could make a model of a helicopter and have a very thin, transparent pole type thing coming from the bottom of the helicopter to the ground so that in effect it would be just a very tall unit but would look as though it was a hovering helicopter. The problem being that it couldn't "fly" over any obstacles that ground units couldn't get over. If anyone can understand all that

lol by the time I've got the skills to do all this there'll be a modern total war out anyway.