Hi,
I used the guide at 15seconds.com and it installed IIS, however you need some files from a Windows 2000 pro cd and mine also asked for some files from a Windows XP home and Windows XP Pro cd (took a while to find them!).
It worked fine for a couple of days then stopped working (probably one of the other users!). Have tried to reinstall it but it is no better.
Just my experiance with this method! Hope you have more luck than me. (i've given up and have set up a NT4 server with iis!, a bit extream but it works)
Russell Hancock