Open up your site in Expression Web. If you need help, refer to the beginning of this article: How to modify your page via FTP in Expression Web. in the beggining it will show you how to bring up your site via ftp in Expression Web.

Once you've done this you must now follow the instruction this article: How to publish your site via FTP using Expression Web, on how to publish your site to a different site via FTP in Expression Web.

But the only difference is instead of using your ftp address (for ex. ftp://ftp.yourdomianname.com/) you will use your ftp ip address available to you in the FTP user information page of your control panel, which will be going through your temp url. You'll use this to make sure that everything is working properly before. To check and make sure everything is working, you will need to go to your temp url to if anything has gone wrong.