This is an updated version of F-Script Anywhere, designed specifically to work with new features in Leopard.
All of the certificate copying is built into F-Script Anywhere, you just need to trust the included public certificate (F-Script Anywhere will try to add it to your keychain, you just need to accept the certificate). You may also need to restart your computer (there appears to be a certificate cache on Leopard that doesn’t always update properly).