Correction. His name is Joe and he's with WHMCS. Here's the thread that I found that in:
http://forum.whmcs.com/showthread.php?t=15772&highlight=Joe+integration
Now, how to contact him???
Yeah, I saw that, too. I think his name is Ed and he charges $35 or something like that to completely integrate for you. I've heard he's really good. I'll take a look and see if I can find that thread.
I just realized this does NOT fix the invoicing email. That email defaults to the root URL. There's got to be a way to reference the wrapped url using php. I'll continue to work on it. Maybe create an include to reference or something. I'm not really a php expert... still learning. I know just enough to be dangerous! )
I'm not sure if this is what you're referring to, but I simply edited the email template and replaced [ClientAreaLink] with a link directly to my wrapped client portal page. I've tested it, and it seems to be working. I did this on the Client Signup Email. I masked the link in the text "Client Portal".