I assume you are using the latest version of the various software components. The software allows a player to be identified either by a local club id, or by the player's id in the national bridge organisation (NBO). The NBO id can be up to 8 digits long. You don't say in which country your session takes place, or whether you are affiliated to an NBO, so I am assuming not. In this case the solution is straightforward. In BridgeScore, on the "Club Admin" screen, set Country(NBO) to "other". Then, when you add names using BridgeScore, type the corresponding 5 digit id into the "NBU Number" field on the "Add/Edit Name" screen. You can leave the "Player ID" field on this screen blank.
On BridgePal, you can now key in the 5 digit numbers that you have entered in BridgeScore and it will pick up the corresponding names.