Guitarhacker
Yeah... you will need to open the bundle. Then, it's simply a matter of selecting the tracks you want in the other project and with it open as well, you can drag the tracks between the two projects. Once the project has the tracks in it that it needs, simply close the bundled project and work on the important one.
No, you can't drag between the two projects because MC doesn't allow you to open more than one project at a time. sonar does, but not MC.
scook's solution is the correct one. open the bundle, export the tracks you want to move into another project, just select TRACKS as the "SOURCE CATEGORY" so that you're exporting individual tracks and not the output of the bus.