Creating A ASP Computer System Builder

I work for a computer reseller company in New Zealand and I have been given the job to create a system configurator for customers wanting to customise a PC for themselves. I have no idea how to go about this, therefore asking if anyone knows where there is a good tutorial on creating something like this.

I know there is a PHP one called PC Builder, however I'm after a ASP one instead, and so far have found nothing on the Internet. I'm using SQL Server 2000. Our computer company address is www.computerfuture.co.nz for an idea on what we do. I'm doing a major change to this website, and a PC Builder.