From memory, there are more than 5 Aerosmith tracks used, although there are only 5 ride variations. Several of the variations feature more than 1 track (and 2 have been re-recorded for the ride - Love In An Elevator, to Love in A Roller Coaster, and What Kind Of Love Are You On, to What King Of Ride Are You On).
I think the full line-up is something like this (and I had to do some digging!):
Love In A Roller Coaster/Walk This Way
Young Lust/FINE
Sweet Emotion/What Kind of Ride Are You On
Back In The Saddle/Dude Looks Like A Lady
Nine Lives
There. How did I do?!