rhythmic, slapping/tapping harmonics guitar such as andy mckee tuning

[pandaman37]

ok so im wondering, in order to get such melodies as the one to drifting http://www.youtube.com/watch?v=Ddn4MGaS3N4
or erik mongraine's airtap http://www.youtube.com/watch?v=AbndgwfG22k
do they use strange tunings? cos the intervals im hearing are weird, especially at looking where hes fretting. anywho when i get some skill (its practically nonexistent) ill be trying to play some of this sorta thing so help would be appreciated

[SoComSurfing]

Alternate tunings. According to Erik Mongrain's site, "Airtap!" is tuned FACFCF.

[pandaman37]

oh ok that does that then... well for that matter, are there tunings more suited to classical music or such other styles?