You guys rock! Thanks! I'm very impressed with both ISPConfig, and the level of support you, Falko, and the rest of the community provide on the forums.
I had the directive syntax munged in my original post for this thread. In case anyone wants to disable SSLv2 (has known vulnerabilities), this is what I added after the "SSLEngine on" directive in the make_vhost function:
SSLProtocol all -SSLv2
Just out of curiosity, is there a reason I was not able to add this directive through ISPConfig's "Apache Directives (Optional)" field for the site?