Proxus,
Try the Nokia PC Suite at:
http://www.nokia.com/nokia/0,5184,3608,00.html
This software adds in all sort of support for your phone including the ability to use it as a modem.
Another thing - You may need to activate IR in the BIOS of the laptop before W2K will 'see' it, I've come across that problem on Dell laptops - Don't know if it's the same with an IBM!
Gary.