Pentatonics are not really scales...if you're playing them up and down all day, you're not really accomplishing anything. Pents are meant to be used in leads - the 5 forms just show how/where to run up and down the neck to locate the same 5 notes (patterns if you will), and tie your lead/solo together in the same key.
Check my lesson site out - may help clear this up and give you some ideas.
-Bob
http://guitar-wav.com