Simmulating the New/Associate function via Weblink

Question

Here is the scenario: I need to create a Policy object from an Opportunity via a weblink. I currently have a Policy field at the Opportunity which has a lookup. When clicking the lookup:
a) The Policy Search pops up with the NEW option
b) When clicking NEW the new Policy form pops-up
c) When adding data and clicking SAVE the Policy New and Search pops-up close and now I have the Opportunity with the Policy field populated with new one
I would like to by-pass all this clicking by adding a weblink to the Opportunity ("Click here for new Policy") that pops up the same form in (b) above and when clicking SAVE it closes and ASSOCIATES the new record back to the Opportunity. So far I've been able to pop-up in the right context (copy pasted URL from (b) into weblink), however the association is not working as expected.
https://secure-ausomxima.crmondemand.com/OnDemand/user/Policy.AssocEditNew?OACTRL=Policy+Policy+Number&mapBC=Opportunity&ophd=Policy+Policy+Number&ophi=Policy+Policy+Number&pfid=OpportunityForm&OMTGT=PopupNewForm&OMTHD=New&ophpd=1&OAOBJ=Opportunity&pfrid=%%%Id%%%&mapField=Policy+Policy+Number&iled=true&iled=true&OCDCS=null
Has anyone done anything similar? Is there a better way to create a new record directly besides weblink?
Thanks,

Answer 1

Thanks - that was my initial idea, however, the Policy - Oppty relationship goes from the Policy to the Oppty: One Policy can have many Oppty and one Oppty only has one Policy. Therefore, when sitting in the Oppty I can't list the related Oppty's with the NEW button since there is only one. Is this what you were referring to? Or maybe I'm missing something? Thanks again - your input is greatly appreciated.