在CI构建期间在源代码管理下自动更改web.config

I am working with couple of friends on an ASP.NET MVC website. The project is maintained in SVN and I have CC.Net set up to checkout latest version and do automated build and deploy to a pre-production server. The default build configuration is set to Debug, but the automated build is set to build Retail. Everything works just fine, except for the I am working with couple of friends on an ASP.N