Yes, I know people won't want to hear this . . . but scales are more important for a guitarist than for a keyboardist!
8O
You can't play lead guitar without knowing scales backwards and forwards. Also, with keyboard, you can look at your hands . . . guitar you can't. You go by ear and feel.
Why can't you look at your hands playing guitar? Personally, the easiest way to remember scales/modes, is to familiarize yourself with the shape that it makes on the fretboard. Once you have that down, and know where the root notes of that shape fall, you can move that sucker anywhere on the neck.
This works well for knowing certain chord progressions as well. Such as, when playing an e-shaped barre, the 4 chord is the a-shaped barre directly below it, and the 5 chord is the a-shaped barre two frets above that, then your 2 chord is the e-shaped barre directly above your 5 chord (this is the "box pattern" people talk about).
As for scales, I would suggest starting with you pentatonics, then learn these with you "slur" notes, then move to your majors. E-mail me if you need any of these transcribed for you.
Good luck.