Question on multiple python environments in Apache

[Jeffrey Gaynor]

I have several different versions of a web app that run under Apache. The issue is that I need to have several different configurations available under several environments (such as Django, mod_python and plain vanilla mod_wsgi). Is there a simple way to get several of these to be completely independent? I thought about virtualenv, but it seems that I can only get one virtual environment for the entire server (so this just keeps it distinct from my main python install), rather than half a dozen. These will be on a dedicated test server so performance is not an issue.  

Does anyone know of a good FAQ that discusses this? 

Thanks in advance,

Jeff