Buckethead tapping

Buckethead often tapps with two (and four) fingers and he change finger everytime he tap, but i can't figure out how. I have seen the Jordan tabs and the look like this:

    T    T     T     T     T     T

D|------------------17-12-16-11-15-10|

A|-17-12-16-11-15-10-----------------|

Thats not hard at all really, but i can't see how buckethead can tap that with two fingers unless he change from lets say A string to D string every time he tap.

I can try to explain it again of it was hard to understand:P

Help

http://www.youtube.com/watch?v=A6bMssZGOG0

this guy has a really helpful lesson on finger nubbing

its called finger nubbing and to make it simple you go from pinky(righthand) to pinky(left), ring(right) to ring(left), middle(right) to middle(left) and index(right) to index(left). look up video game death licks on youtube and rusty cooley explains it a bit. its similar to bucket heads stuff