If you have to use the 'Wizards' from ASP.NET, CSS Friendly is an absolute must for CSS styling. The tables that are emitted by the wizards are replaced with DIVs which can be styled.
Project Description
The CSS Friendly Control Adapters kit (for ASP.Net 2.0) provides pre-built control adapters that you can easily use to generate CSS-friendly markup from some of the more commonly used ASP.NET controls.
Goals
The goal of the CSS Friendly project is to transform as many of the traditional ASP.Net web controls to provide CSS-friendly, browser-compatible markup. The project will be released as a single DLL which can be referenced in any web project for simple distribution.