You're still on AD? Shoot me a Pm with more detailed info on what you need (it should be listed in my contact info). If I can't give you all the help you need, I can point you to the guys who can.

PS: Cavguy - The DSU are no longer in existence. They were created to bridge the gap between the USMC Small Craft Company (disestablished by the USMC) and the Navy Riverine Group One. The Marines trained up some reservists and put them on the boats until the Navy was ready. RIVGRU One now has the Haditha mission. The Army does have units who have done riverine ops but only because there was no one else to do the job. The 101st, 25th ID and 10th Mtn all have conducted riverine ops.

PPS: Don't use the current Navy riverine doctrine (actually it's a CONOPS). It won't help you. The older stuff is actually better. For what you want, look more at the USMC SCC.