The only names given were Howard, Costello and Peter Shergold, although ten people were supposedly there. As I said Rudd was percieved as too academic for the job, too long winded, he wasn't expected to go down well with the core labor supporting blue collar worker. The main plus about Lawrence was that a western Australian leading the labor party might threaten what was core liberal territory in WA as indeed it did under Beazley. There was the added threat that she had experience being at the top, none of the other contenders had much experience actually governing as opposed to being part of a legislature.
Also remember this was before Rudd really came to prominence, I think it was the 04 campaign where he really got recognised as one of the ablest frontbenchers in parliament.
Finally Lawrence wasn't rated a huge threat, merely pointing out how lowly Rudd was once thought of.