Creating a chained certificate is a matter of performing a few command line operations to 'cat' your public certificate and the CA's intermediate certificate together. These operations cannot currently be performed from the web Admin Interface.
If your public certificate is in the file 'my.pub' and your CA's public certificate (the intermediate cert) is in the file 'ca.pub',do the following:
cat my.pub ca.pub > chained.pub
The ZEUSHOME/admin/bin/cert program has a '--check' option to ensure that private and public keys are part of a valid pair. Run this command to ensure that your new certificate is valid:
cert -key <your_private_certificate> -in <your_public_certificate> --check
The chained certificate 'chained.pub' can now be renamed if neccessary and imported into your virtual server via the web Admin Interface.