Scripting help needed.

[RTW~MM]

I am trying to figure out the verbage needed to bind a key that will toggle between primary and primaryb weapons. The format used for other games using this engine does not work, however I am certain that it can be done. Does anyone here have some insight on what the command needs to be to accomplish this?
I have been able to make a script to switch from a specific weapon to a specific weapon, however this is not desireable since the primary and secondary weapon changes from map to map, and often changes during individual map play. (Stealing your opponents weapon is particularily FUN)

Also, if anyone has any good links to topics discussing scripting, it would be appreciated if they could be added here.
Thanks in advance!
Moose