Linking to documents in Sharepoint

We are trying to manage our business documents in Microsoft Sharepoint
Server (MOSS), and would like to create links to them from Vantage. For
example, if a supplier has particular terms & conditions, we want to
store that T&C document on Sharepoint but be able to access it from
Vantage.

Is there a way to do this? I have tried to do this by creating an
attachment (eg http://intranet) but no success.

Russell.
Vantage 8.03.404B, SQL