FTP - moving/copying files

I'm setting up an ftp manager which allows a user to connect to their space on an external server. All the php-ftp functions work fine - after I'd realized how to use the passive functionality - see previous email to list! I've also got working the download and upload functionality, which is quite nice, but annoying - it doesn't allow you to download the file without creating a temporary version (whereas if it were a local copy you'd be able to copy it to a variable, then echo it out... Finally, what I now need to do it be able to move/copy files within the FTP space. The standard FTP commands (mv & cp or copy) are not featured in php-ftp functions. Does anyone have any suggestions bar copying the whole lot to a local drive then upload in the new space? Cheers Nunners