Exim Expert Needed

I need an Exim expert to configure my server to run multiple instances of Exim. The server runs on Cpanel and I have about 4 Class C IPs assigned to a single NIC. There's only one instance of Exim running on Port 25. I would like to run Exim on 2 different ports and each instance should use a unique interface (IP address) to send out mails. I have been able to configure Exim to use a different IP than the main server's IP by editing /etc/[login to view URL] and adding following lines: remote_smtp: driver = smtp interface = --IP Address-- I need to get this job done asap. The next phase of this project will to configure Yahoo! DomainKeys to work with Exim. Please bid ONLY for this phase. Thanks!