Hi，
I think you can consider Accounting Interaction Center (AIC).
The AIC supports in particular the integration of the following application components
of SAP ERP:
•Financial Accounting (FI)
•Controlling (CO)
•SAP Biller Direct (FIN-FSCM-BD)
•SAP Collections Management (FIN-FSCM-COL)
•SAP Dispute Management (FIN-FSCM-DM)
In the AIC you can create connections to multiple ERP systems and clients.
For the detail, you can check the sap help link below:
1.sap help link:
http://help.sap.com/saphelp_crm700_ehp01/helpdata/en/57/a3e4db142f495484138b83380026d7/frameset.htm
http://www.sap.com/solution/rapid-deployment/software/financial-shared-service/index.html
2. Relevant note:
1790236 - Financial shared services framework FAQ
May be you can check the documents mentioend in point 5. How to configure Shared Services Framework?
You can check the SSF Configuration Guide available from SAP service market: https://websmp209.sap-ag.de/erp, from left side navigation area, open the links: SAP Shared Service Delivery -> Media Library - Shared Service Delivery, then you can see there is a PDF file named 'Configuring_the_SSF'.
Best Regards,
Bruce