Importing Heros

OK...I tried using the export/import method that was described to me in these forums but I have run in to a snag. When I import a custom hero from another map into my existing map it tells me that "Imported unit data will replace all current unit data. Continue with import?"

When I hit yes it imports the unit data but, as the message states, wipes out all of my custom data. Is there anyway to prevent this or is there a different way to import/export heros from one map to another?

well no if you dont just copy the custom data and pastes it in your map

You can Copy (Ctrl+C) and Paste (Ctrl+V) a hero from one map to another. However, if you don't have the skills pasted beforehand, the hero will have different or unknown skills.

Copy / pasting would be best...