First hear are the scale degrees, and Modes, but I have a question...
Torch, where's the question?
Yes I have a working knowledge of modes. I was just wondering how would you know which notes to use when you start feeling the song and want to put some runs and stuff in it. So you wont sound like a robot just playing something the guy playing the keys can play with his left hand. I dont want to fill every iota of sonic space, just enough to groove with the drummer to add more "feel" to it.
From the initial statement, I thought of this as an assignment from your instructor, something between just you and him. In that case, I wouldn't worry about how the drums would fit in yet. Those are two seperate issues.
I would first try and understand where he's trying to take me to and then later try and see how I would apply it to my playing. Regardless of what anybody on this site says, it all boils down to what your instructor wants. Why don't you just ask him?