Yeah, that would be awsome.
Make the infantry squad have a primary weapon of 4+ M1 Garands and a secondary weapon of either a bzooka or .30 cal MG. .30 might look wierd carried around, so maybe a BAR would be better. But the trick with that would be how do you make them change magazines? Or reload the bazooka?
Using the jump to gunner keys you could jump to different guys in the team. You could even have the rocket gunner activated with the bombadier key, so you could even have a sight for it.