Hi, complete newbie here, noob, whatever....anywho, I have 3 MLD-2 and i would like to know how to configure to only use one per coin if so desired.
-S MLD:All --set MLD:clock=756
pause
So in other words, if I just wanted to start one, what would I put in place of "All" after MLD:
any help would be greatly appreciated.

you need 3 different .bat files, one for each coin. in place of the "All" you would put the MLD# you want to use for that coin.
Go the easy route, download Multiminer, then when you install it, find the folder it's installed in, go in the Miners folder, there is a BFGminer folder in there, delete the contents, replace with the BFGminer you downloaded for the MLD's.
That app lets you independently control your devices so you can set then to do different coins or the same coins. Nice user interface too.