Upgrade Tool.zip, is it necessary?

Hi, I recently acquired a used Latitude CPtV . It had Windoze 2000 on it, and I did a clean install of XP Pro. The system install went perfectly on this Pentium III notebook, and it started out with a fdisk of the drive. I have been browsing the Dell driver downloads at http://support.dell.com/support/downloads/and found a "upgrade tool.zip" file for XP . My question is whether I need to install and run this tool as I already did the XP install with no apparent problems? I wonder if not running it may somehow limit the functionality of this six year old laptop? Thanks for your response! Klawda