JE - You can see all of the pictures here:
stratous.250free.com - Browsing Directory: /Models/Audi/S3/
When I make the windows, I model all the way around them. Then when I am ready for windows I fill it the hole then chamfer around the edge to make the molding. Then it just comes down to extruding and detaching.
There are wireframes in the link I posted, hopefuly they help, if not just ask some more.
Projects:
http://stratous.250free.com/Models/
Real Rides:
2002 Dodge Dakota Sport+ - 4.7 V8, 4X4, Auto
1989 Dodge Daytona Shelby - 2.2l Intercooled Turbo, 5 speed
1988 Dodge Daytona Shelby Z - 2.2l Intercooled Turbo, 5 speed