I'm a bit reluctant to try this out for fear of breaking something... but can you turn the config.php file into a couch template?

[KK]

I am afraid, no

Can I dynamically edit the config files email address by setting them with a variable?

[KK]

I presume you'll be using the emails in contact forms.

If so, you don't need to use the config file for this at all.
Create a 'global' template with editable regions to hold the email addresses and use these values in the contact forms etc.
This way the values would be editable for your users.

You might find the discussion on global values in our tutorial (http://www.couchcms.com/docs/tutorials/ ... -ends.html) useful.

Hope this helps.