If you want to go with that interpretation then your Hide checks become a bit more complicated to resolve. On any given round, if the hider:
(1) Moves half their speed of less, then make a single check with no penalty.
(2) Moves their speed, then make a single check with a -5 penalty or two checks with no penalty.
(3) Moves more than their speed but less than half their speed, then make two checks with a -5 penalty.
(4) Moves more than twice their speed, then make one check with a -20 penalty.
(Or you could just interpret a double-move as being a full-round action and save yourself the hassle on this and a half dozen other skills. )
Justin Alexander
http://ww.thealexandrian.net