Adding a colum to a merge replication

Hi,
I have a question on how to add a column in a merger replication?
Actualy I know how to add a column in a publication for a merge replication
What I need to know is how to create a foreign Key for that column
Exemple :
01- I have a table myTable that is already in my publication as an article
02- I want to add the column employeID int NULL
03- I also need to create a foreign key on that column to another column of
another table that is also in the publication
Is that possible ?
I have a doubt because a forign key is an alteration over a table and not
over a column and I think we can not make an alter Table on a table that is
in a publication with Sql 2000
SO is there a way we can create a foriegn Key for a new column in a table
that is already in a publication ?
Thanks in advance !
Pls have a look at sp_addscriptexec.
Cheers,
Paul Ibison SQL Server MVP, www.replicationanswers.com
(recommended sql server 2000 replication book:
http://www.nwsu.com/0974973602p.html)
sql