I've been thinking about this and may have found a solution, although it is still a little work.
I just tried it on SONAR X3e 64-bit and it worked as I thought it should.
I randomly imported audio and MIDI into a new, blank project, then split each track (with Snap off) at approximately the same places. Set the Nudge to Musical, Measure and nudged them to the right. All the split clips moved that amount.
You will have to bounce to clips, then split where you want the new measures inserted.
Set one of your nudge times to musical, measure, and nudge as many times as you want for the space you need.
It would be nice if you could nudge more than 1 measure at a time, but clicking 2 or 3 or 10 times isn't too tedious.