Help modifying bb-services

I'm currently working on a project that I need to get hobbit to test authentication on a number of servers namely an IMAP and SMTP server, along with a few others. I was guessing having little background in network diagnostic that I could modify the sent responses within bb-services to login to the server using a test account and then check for the proper response back. The problem I've run into is that I'm not clear on the proper commands or syntax to do this and when I have modified the tests it seems that I'll get a green event regardless to what I put within expect. Anyway if anyone could point me in the right direction (Examples are great too) it would be greatly appreciated.

Thanks,

Robert Bethke