From the original layer, go to the Red Barn tab. Open the C/F/F/ right click and select Properties. Click the Add button. Enter a description for Zone ID. Select Text for the Type. Click OK. Display as top layer and click Edit Layer. Then you can Add all the desired Zone Id as you like with letter - number combinations. This Layer will then need to be exported as an ArcView Shape file. However, the .csv file column for the zone ID must also be setup as Text not number so you can import under Read Job data Generic - Text option. When coming to the second screen make sure to select the Join File Data with existing Shape File. Browse to where you exported your modified zone map. Continue.
Hope this makes sense. Please let me know if I need to clarify anything.