I am not completely sure what you are attempting. You say you want to enter "pots" from one card to another. If you are talking about items that are listed and located on a mapping card the answer is NO. The info on them is proprietary to them only. Mapping cards are write protected and if you mess with them you will destroy them.
If on the other hand you are referring to waypoints, then they are stored in the unit head, not on the mapping card, and can be seen as overlay data on any mapping card you put in your unit.
If you will explain in more detail, I will be glad to try to help you.