I don't believe I have heard of them before. I found a couple of their songs and am going to download "Carry Away" to listen to. So, far tho.. I haven't found any of the songs or album titles you mentioned. ... As far as your questions about which one is first in that chord. I think that depends on the sound you want from it... usually tho, when strumming I go from the bass strings toward the high for the first strum....
About the explination of how to do hammer ons, etc. Have you tried to see if there is a tutorial on this site? I'll see what I can find.....