Custom record label

Hi folks,

I'm looking for a way to change the label of a family record or an 
individual record to an identifer that I've chosen myself. For example, I 
would like to create a new individual by doing:

$record = $ged->add_individual();

And then set the label of the individual to e.g. "@I5144235@", rather than a 
running number automatically assigned by the Gedcom module. Is it possible?

I would like to build a gedcom file for a population of  banded birds, and 
it would be very convenient to use the individual band number of each bird 
as a label. The birds are already in a database, and I'm using perl to read 
a textfile export from the database with all the birds and their "families". 
I'm new to both gedcom and perl, and hopefully this question doesn't sound 
too stupid.

Many thanks in advance,

Tobias Sahlman