Rename custom field names under the "Additional info" tab to something other than "field 1" ?

SUGGESTED

Can you rename the custom field names under the Additional info tab to something other than "field 1" ? I need to add a customer & vendor ID to each customer/vendor record to run integration from another software.

Since Sage 50 does not have a visible field for this I was hoping I could enter this under the additional info tab and rename "field 1" to something more user friendly?

All comments & ideas are welcomed!!

Sheldon