If you're into it and got a few hours to spend, check out my lesson at Activebass.com, its called Tetrachords 101 and its in the Theory section. I just put it up. My lesson was intended for people that knew basic theory but want to apply it to mass fingering solutions for any mode, without memorizing each mode as a seperate entity. If you know scale degrees, major and minor, and whole and half step spend a few minutes on my lesson you'll be playing modes all up and down and around and under the neck. This goes for anyone else. 
