Converting global timecode animation formats to local timecode animation formats is easy, because MainActor VE can set every local timecode to the global timecode of the source project.
This does not work the other way round, as you can set the global timecode of the animation to only one of the local timecodes of the source project. MainActor VE tries to calculate the best global timecode for the new project and inserts dummy frames behind frames which have higher timecodes than the new global one.
This all sounds a little complicated but we hope MainActor VE does the job without your even noticing it.
If you are not satisfied with the timing of a certain animation, you can always split it up into pictures, load them as a picture lists and can set the timecodes of the pictures yourself. If you want to add dummy frames in the resulting animation, simply add the same picture various times into the picture list. Of course, a later version of MainActor VE will have a sequencer which will make this kind of work very easy indeed.