Scott,
Unfortunately I am not overly familiar with the HSphere control panel. From what I recall, it is their own solution (unlike the widespread cPanel, Plesk, or Ensim managers).
You might ask your host if this (email "aliases" that forward or "pipe" email to a .cgi script) is supported and, if so, how it is set up on your server. Your admin might need to set these up for you.
Regards