I finally found out where to customize the WebForm1.aspx template for Visual Studio 03.

C:\Program Files\Microsoft Visual Studio .NET 2003\VC#\VC#Wizards\CSharpAddWebFormWiz\Templates\1033\WebForm1.aspx


Now I don't have to keep removing all those extra tags that Visual Studio likes to add. MS_POSITIONING?!?! Am I the only programmer who knows HTML and CSS?

Of course, you could just read this article and build your own custom form wizard.