I haven't done this, but this is how I would approach the solution.
I am guessing that the fields in the database or datasource use the longer names, and I am guessing that Crystal will use the name it 'sees' in the export, so I would try creating a formula that is named the simpler name just displays the longer named field.
For example the formula called CallNo would look like:
GH1_INMAST_VIEW_CAD_Call_No
and try exporting.
It's just a thought and there might be a better way out there. Anyone else?
Hope it helps