RTC plugin cannot handle very large change sets

There is a developer who ran a script to change a large number of files.  This generated a change set with 3832 changes.  She needs to split the change set so that the items can be associated with different uow, but Eclipse cannot expand the change set in Pending Changes.  It will expand in Change Explorer, but she cannot move files to different change sets from there.

Is there a way to split the change set out without just starting over and associating the changes with the different uow from the beginning instead of creating one big changeset.