You can access FrontPage Web Administrator directly from the Control Panel, clicking on the FP WEBADMIN button, or FP-SSL WEBADMIN if you wish to access over secure SSL connection. These buttons are located at the bottom of the Domain Administration page, provided that the hosting is set up for the domain, and FrontPage is available.
The FrontPage Web Admin software should be installed and configured properly for this function to work, and the FrontPage and FrontPage over SSL support should be enabled in your Plesk 6.0 software.