Yes, technically it is possible to add a little info via the existing admin panel to have access from anywere, but it is very unpopular to inform what to write.
The solution I use myself at the moment is to run a local Windows 2000 workstation for remote access via logmein.com (Host system Centos 5.3/vmware server with a virtual sme 7.3 + a virtual smoothwall firewall plus a virtual Win 2000 workstation.)