I'm slightly confused - you are trying to replicate the first mission of Red Hammer in the Xbox mission editor, right?
Well if you have the PC game then simply use Amalfi's pbo decryptor 1.5 from the Editors Depot to unpbo the campaign/mission, and then you can examine it in the PC editor at your leisure.
(My understanding is that RH is not on the Xbox, so to know about it you must have the PC as well.)
Apolgies if I've misunderstood and this is all a load of rich creamery butter.
Oh, and
Welcome to the forum!