I don't know if Quark can 'talk' directly to a remote host or not, but if it can't then your Mum wants to get a simple FTP client. Depending on whether she uses a Mac or PC there are plenty available.
One the Mac I favour Captain FTP, but have also used Fetch, Transmit and Cyberduck and all are decent enough.
The PC has even more clients available. I'd suggest popping over to versiontracker.com and searching for FTP clients - the users there rate software plus it shows whether they are freeware, shareware or commercial products.
For what it's worth I use DW for my web work but never use its FTP capabilities preferring Captain FTP every time - it's just more reliable!
Greg
I think therefore I am, you're pink therefore you're spam