There is a tutorial for making a simple web design with Photoshop. I converted that design to be SiteGrinder ready some time ago, but forgot to blog about it. Anyway, no detailed write up today.
You can get the modified .psd file here: http://www.medialab.com/PWMenus/print_branding_web_seo_demo/print_branding_web_seo_sitegrinder.psd.zip
And see the conversion here: