If I understand what you mean, siteexport is just that. It can be installed into your existing system without any problem - and it wont change your content. In the admin area you'll then have a link into the manager where you can export your site. With intact links.
Except some php requirements (ziplib - which I hope to resolve in the near future)
The siteexport also offers an URL configuration that you can type
http://www.com/?do=siteexport&options and receive the zipped standalone version in one process.