I would like to convert “Account Name” field in Leads module back to releate field.
This worked fine, but i would also like to auto populate fields(like city, address, etc) when an account selection is made just like in Contacts module.
These tutorials both show how you can do this by editing a file found at /custom/Extension/modules/<MODULE_NAME>/Ext/Vardefs/
If these don’t help then you may also be able to do it through the use of Logic Hooks.