How hard would it be to create another tab and run an auctions through the same site??

Im very interested in this and realise i would have to change almost every aspect about the site.

I have very little knowledge on programing and im using microsoft visual studio 2008

Any information will be a big help to give me a better understanding.

Thanks in advance

Its pretty hard :)

I changed my site to a bartering website and added a whole bunch of other stuff. (love2trade.com - will not be out until december).

Adding another tab is easy, you can do that in sitemap by adding another node in the xml.
    <siteMapNode url="~/Auctions.aspx" title="Auctions"  roles="*"/>

If you have little programming knowledge then you'll probably need to practice or you can pay me a whole lot of money to help you :P

Good luck! :)