I have played Vitenam battles Arabic Israeli War battles generated for CMAK and though they were fun and innovative, in one fo the Vietnam scens HT with quad guns were dig in into shallow fords to simulate PT boats docked at a base along a river. My VC attacked the Base from all over the place (VC was italians with uniform mod) in terrible rain. Fun battle. Was able to knock out 3 PT boats with small mortars and create havoc in the American base then dissappera into the thick woods again...hit and run. Some of this stuff can be found in
www.the-scenario-depot.com also some scens about Korean war and such.
Good Hunting
But one cannot change the hardcoded unit frames so sherman frame is sherman frame one can only change the skins by modding.
Hope this helps
LT
EDIT TO ADD: Vietnam mods and AIW and Korean mods can be found in Cmmods.com search mods by author junk2drive in CMAK section