i have the dvd...
will get to the bottom of this...hehe
from what i know.....eugene's trick bag was performed twice in the movie.
one when eugene was practicin arpeggios on his nylon string--in his room.where he later picked up his beaten up steel string and proceeded to thump out a blues in E.
steve vai did the electric guitar version of trick bag--i mean he recorded it with ralph machio aping the fingers. i believe it was also filmed slow and later sped up to match the tempo of the real recording..so that's two
three if you count the "banu" version that steve vai did to answer eugene's challenge.
and vai's character was 'jack butler' the devil's guitarist.
will come up with the singer who did "crossroad blues" in the beginning of the film.
also there is a ms. narcisso during eugene's exam.pointed out to me by butch roxas, my classical guitar teacher in UST/blue rats guitarist...ms narciso is of filipino heritage.