#1
Can anyone tell me at least a beginning point to the theory behind the part of this Sun City Girls' song, starting from around 1:10 in?

http://www.youtube.com/watch?v=YRY7_Q9HWs8

Obviously it's like "acid jazz" of some sort. I really dig it but have no idea how to even think about replicating this. Can't even figure out the intervals here.

The major key stuff in the beginning is about my level of knowledge.
#2
Sounds just like a harmonic minor scale or something similar.
Only play what you hear. If you don’t hear anything, don’t play anything.
-Chick Corea