To be honest the most simple thing would be to get a splitter so that yu can play it on 2 monitors

Yes. You only need a splitter pretty much similar to those DVD splitters. This is great and all but I recommend using an overhead projector instead. Its compact and easy and saves in electricity. Also, it displays big and if you don’t have the screen, you can just point it at some wall and play there. it seems pretty weird, I know but when I had a party and did that, my friends were pretty amazed because they aren’t used to that. I just put the sensor bar below using a table.

By the way, there is no splitter for the sensor bar but since you are playing guitar hero, you don’t need it.

Hope this helps

Not really, The Wii’s cables only have the composite option right now. You would have to visit radio shack or your electronics dept for 3 splitters- ( I did this on a setup for a friend of mine so his kid could play in living room/bedroom) They’re about 2-3 bucks apeice so It’s about 9$ that you’ll spend. They look like little Y’s.