How to merge HRM and FSCM at one organization?

Hello,

We have PeopleSoft HRM and FSCM at our organization that reside on separate URLs. Users are required to maintain 2 distinctly separate logins causing password confusion, but what's worse is the session confusion that occurs within the browser. We spend entirely too much time resetting passwords or fielding questions about invalid nodes because people click back and forth between HR and Finance without understanding the browser layer.

Does anyone have any experience or advice in making these 2 environments more seamless or play together more nicely?

We have 1000s of frequent turnover, non-technical end users, and no amount of communication helps us curb the amount of time we spend on the same issue over and over.