Your rig looks about the same as mine will.. once I get the guts to press buy on the website . I was wondering what type of cooling you are using, and how much of it? I have heard some people using many different cooling systems in one rig to keep it cool!

1. no clue.
2. It mythed that it does increase proformance, but last ive checked there are very mixed results.. I am betting its based of the rig that you have.. What I am thinking with bad computers, the many diffent folders clog of the memory or w/e in the computer so it decreases, but with good computers that can handle like all that space of 4 wow folders, then it would increase. I would try it out and see how it goes.
3. Im pretty sure spliting them manually will help. Again try it and see how it works on your rig specifically.