Installing IIS after .NET framework 3.5 has been installed

I'm aware of the procedure mentioned here to re-register ASP.NET if IIS is installed after the .NET framework has been installed:

http://www.mike-tech.com/article.php?gif=iis&article=281

However, most of these articles are old and refer to ASP.NET as part of the .NET framework v1. On the system I'm looking at here are four verion folders:

v1.0.3705 – doesn't have aspnet_regiis.exe in it
v1.1.4322 – does have aspnet_regiis.exe and I assume is the main folder for .NET v1.x
v2.0.50727 – does have aspnet_regiis.exe and I assume is the main folder for .NET v2.x
v3.0 – not in here
v3.5 – not in here either

Do I have to re-register both v1 and v2? If so, in which order?

Also, when I install IIS on this Windows 2003 server, the ASP.NET checkbox isn't checked. This refers to ASP.NET v1 doesn't it? I'm going to check it anyway although I assumed that as .NET v3.5 had already been installed, ASP.NET was already there. Or is ASP.NET in this case a specific part of IIS?

Cheers, Rob.