it's really very easy .. here's an example for sql2k adding a table to transactional replication:-

--

-- add table to publication

--

exec dbo.sp_addarticle 'mypublication' ,@article='mytable',@source_table='mytable',@destination_table='mytable',

@force_invalidate_snapshot=1

go

--

-- refresh the subscription

--

exec dbo.sp_refreshsubscriptions  'mypublication'

go

--

--

-- now run the snapshot agent which will only update the object changed/ added new object

--

exec msdb.dbo.sp_start_job @job_name='xxxx 'mypublication'

go

--

get the name of  'mypublication'

 --

-- execute within the published database e.g. the database being replicated

-- to obtain the publication name

--

exec dbo.sp_helppublication

go