Those of you who have checked Bindows Update will know that MS have released .NET v3.0 to keep XP in line with Vista. ::)

There is an issue with the installer on some machines where it gets half way though then crashes with a generic ERROR 1603... :'(

Try this to resolve the issue and fully install .NET 3.0... ;)

Microsoft .NET 3.0 installer crash fix
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The following steps should resolve the install problem:

Run “net stop iisadmin”
Run “sc config iisadmin start= disabled”
Install the new NETFX3.
Run “sc config iisadmin start= demand”
Run “net start iisadmin”

Hope this helps some people - it worked great for me! ;D

Be sure to download the .NET 3.0 web installer package from the MS downloads page for the install... ;)