software

I just purchased a Peavey Rockmaster from another forum member. I have not received it yet but am wondering if when I get it I could run it in my fx loop instead of in front of the amp. I am trying to trick my 2 channel rectifier into being 3 channels and want to use the rockmaster in the fx loop when the clean channel is on to give me a slightly dirty rythm like the deftones song quot;Changequot;.
I sing and play guitar and have an elaborate midi switching setup so I need to hit one button and go from tone to tone etc. as to minimize my brainwork and toe tapping. I use a Digital music corp GCX audio switcher as well and want to change channels on the rockmaster via the GCX instead of using the footswitch all the time. Is this possible? I change channels on the amp with the GCX so in essence I should be able to but the rockmaster is a 3 channel preamp so now I am confused? Thanks for any help.