Urbanix,
tank you for adding a positive light to this thread.
I have not been here for a while so this is the first time I have seen your post.
About the mailto: problem.
I would tell you first not to use this code. there are bots that search the net and look for this code. they grab the email address and start sending it stock and pen1s (can you believe the real spelling is black listed?) advise like crazy. My advise is where every you would have a mail to, point it to a contact form, like the one that Zen cart comes w/. As a rule I never posy and email address on line.
That being said if you don't mind complete strangers talking about how you please your woman, no matter who your are. the Whole embed_config.php is pretty clear and run on regex al you would have to do is replace the link re writing code w/ a new expression.
That being said, regex is an art form that I barley comprehend (I am just not that lete). the embed_config program took me about 10 hours of hacking to figure out, and really it is not the best set of regex's in the world. I would suggest that you hang out in the #regex channel on free node and bug them.