For the record, I tried merging the certificates using those instructions and then I tried to use the wizard. I got the following error:
Not really a huge surprise because it is not going to match the key if it has two other certificates inside it.
Is there any way to install the root certificates and intermediate certificates using the wizard separately? If not, is there anyway I can add them into a keystore somewhere?
Using certain programs and web browsers, the certificate is valid right now as it is, but it gives "the correct root certificate is not installed". Really need to fix that.
Many thanks,
Gary