I downloaded a program called Guitar Power. Its an absolutly humungouse archive of scales and chords and arpeggios, and it explains the theory behind them and gives you a fretboard display and everything. After 30 days the fretboard display and info buttons are deactivated if you havent purchased it. I havent got it, Im still using the free trial thing, so I gotta order it if I wanna have my fretboard display. Its a great program though.