maybe this will help:
all modes are within each other- and what I mean by that is that in every "pattern" or "scale shape" on the guitar (major or minor or dorian or whatever) all the modes are contained in that shape, it just depends on where you start.
For instance- if you play a major (ionian mode) scale, but instead of starting on the root you start on the second scale degree (example in C major start on D) you will be playing in the "D" dorian mode- just make sure you emphasize the right notes (D F A, root third fifth).
the same goes for any mode - the 6th of ionian will be the first note of aeolian. Fifth note of aeolian is phrygian, 7th note of phrygian is dorian, etc..
so you can switch between modes and stay within the same shape that streches across the neck..
does this help? if not, I probably don't understand the question...
of course, you have to play within your chord progression-- playing random modes will not sound right.