Editing the behavior of the ValidationSummary (asp.net 2.0)

[absolute0]

OK. Spent hours finding out how I can change the behavior of the
ValidationSummary control, so that it is better styled (e.g. padding)
between the HeaderText and the list of errors returned. I also found
out that I needed to edit the WebUIValidation.js file and reference
this in the web.config. Just found out that this is all defunct in
ASP.NET 2.0!!!

How can I make the same changes that I would have made in the
WebUIValidation.js to .NET 2 or have M$ locked things down so I can't
produce usable sites now?

TIA

Dave