ok for anyone interested (tamer this info is in your PM) here is a break down of what figures I think would be simplest and work best for each the at-at driver AND the snowtrooper.
first for the AT-AT driver I would prefer to use the following:
1 at-at driver (with ball jointed torso!, not an older version)
the new ROC gen. Hawk.
for the snowtrooper:
1 snowtrooper (again with a aball jointed torso)
a ROC cobra viper commando (OR the "M.A.R.S. Industries Trooper, they use the same parts)
I'm willing to do the work on the figures if anyone wants one of these (or any mando customs!)
I'm going to start a thread in the for sales section about this as well.
Since I've put the parts out there I'd love to see someone try this on their own... especially since you know what joe parts there is... and knowing is half the battle....