Is there a way to copy a set of frames from a model in MED so that I have duplicates of them?

For example, let's say that I have a model with 150 frames of animation. Can I, for example, copy frames 76-90 so that I have a duplicate set of these frames appended onto the end (thus, the copy becomes frames 151-165)?

I see how we can add a set of frames to the end, but I don't want to add, but to copy a set of frames so I only have to do a few minor tweaks for these new animations (basically making a happy face neutral).

Any help would be appreciated.