Hello! I just got some new components for my guitar rig and im not quite sure how to link it all together...
I have:
Line6 Spider Valve mkII HD100 head and cabinet
bbe 382i Sonic Maximizer
Line6 Pod XT
Electro-Harmonix Metal Muff
Line6 Shortboard

I play mostly metal/hardcore, and I have a Schecter Hellraiser and a Schecter C-7 Standard

I'm not overly familiar with midi setup, or the ordering of effects, so any help would be greatly appreciated.

well, you don't need the pod in the rig (I would also take out the metal muff if possible, you have a modelling amp). not at all. its more a heaphone amp than anything.

as for the other stuff:
-the shortboard is a foot-controller for your amp. its a little more involved than a typical foot-switch, but it just hooks up to its respective socket on the amp (pretty obvious looking)
-the BBE goes in your effects loop.
-the muff can go either between the guitar and the amp, or in the effects loop. I like putting them between the guitar and the amp, as it drives the amp more effectively