I too have some house rules you could try out. insert shameless plug.
The unit entry is a Special unit, so you can scroll down to there, the actual rules are mid way down the second post.
If you happen to try these out please pm with feedback
In terms of how to model them, I would do as you suggested and do a roughly even split of loaders and lauchers. A command would be useful, and would be an interesting challenge (how to make the banner for instance).
Curiously I too have spent a lot of time in the last 2 days thinking how best to model these. Threads about rocketeers/ bazooka CD are quite rare on CDO I think.