Get related list from CRM

Get related list from CRM

Hi,

I've got a Creator form. I want to pull data from Potentials, and its related-list, Products.
This should work, no?
  1. CRMresp = zoho.crm.getRelatedRecords("Products", "Potentials",input.CRM_Lookup_ID)
Can you only use getRelatedRecords for 'sub-modules'?

Can someone explain why custom modules aren't supported in crm tasks?

And is there a better way than clumsily re-purposing a default module for this purpose?

Thanks!
Levi