Why would you spend good money for software that is totally out of date?
Since P98 there has been P2000, P2002, and now P2003 and there have been
signifigant improvments in each release. This is especially true with
the upgrade from 98 to 2000 with the introduction of task deadlines and
the ability to track material resource consumption. P2002 brought
multiple baselines. I would strongly suggest that if you cannot justify
the expense of 2003, at least go back no farther than P2000.