In order to add transfer you have to store transfer ID – in the table of transfers – in the first column. (http://www.unihotel.org/profile/transfers/).
Than from the exact hotel rate section you have to use the following command:
Contr (Transfer_number)
You can list all transfers in one command using semicolon.
If you will delete transfer from the hotel it will break the link transfer-hotel, but will not delete relative transfer from transfer section.