Help Needed: How to use related lists in Potential Module

Help Needed: How to use related lists in Potential Module

I am going a bit crazy trying to find a way to use a related list in the Potentials module.

Specifically, I have created a look-up filed for a "Vendor" so we can associate a "Vendor" (we actually use the vendor module for our sales channel partners) with a Potential.

Where I am running into trouble is trying to then have a look-up to select a specific contact from that "Vendor" with the Potential. I want to be able to click on the "Vendor Contact" field I created and have it list ONLY those contacts that are associated with that "Vendor". I want to have the "Vendor" and a specific contact at that "Vendor" associated with that Potential.

I have been trying to use related lists in various ways to get this to work but I keep running into dead ends.

Can anyone offer me a suggestion on how to accomplish this task.

Thanks in advance for your help.