How to lockdown IE to one specific site?

Hi, Im looking for a solution to lockdown one of my computers to only allow browsing on a specific site. The reason is that this computer is a librarycomputer and should only be used to search in the main librarys catalog.Is there a way to achieve this in Windows alone or do I need a 3rd-party software? Im using windows 2000 pro and the latest IE. I have no concern changing to Firefox if that makes things easier. Thx in advance