Uploading files ONLY to a second FTP server

I want to upload some files to a second FTP server, but don’t want the files on the main FTP server. The setup option only seems to allow sending files to a second server in addition to the main server. Is it possible to persuade WD to do this?

Do you mean you want to send files a,b,c to ftp server 1, and files d,e,f to ftp server 2?

Yes. I want to WD to upload the normal web pages to my normal local weather web site (blackpool.weather-watch.com) and then upload some other (non-WD files) to the main weather-watch.com web site.