You could actually keep the config inside httpd.conf but do it with PerlSetVar commands that you read in your code.

I can't tell exactly what you're doing with the user information object, but the approach I was referring to uses the TT2ServiceModule option. You might want to take a look if that's not what you're doing now.

I completely agree that running some code and then dynamically choosing a template is better, which is why I don't use Apache::Template. It's much easier to do that when you call Template directly.