small single user auction site

hello, I would like a auction website created as close to this site [login to view URL], I will also need a register area so passer bys dont bid without signing up, just simple signup, name, username, address, zipcode. would also need it to be installed onto my server and be as easy as possiable, would only need to support 25 auctions at a time, I will be posting, no one else. also need winning bidder email sent and outbid email sent to the user. also a thank you for registering email sent to people who sign up. I am not apposed to a wordpress script, but I would need it to not be associated with wordpress at all, others have tried this route but it always led back to wordpress and the registration part let the user know it was a wordpress theme. I DO NOT WANT THAT IN ANYWAY.. this is very important. I would also need access to change colors and text as needed. Thanks.