Have a look at following link.
http://help.sap.com/saphelp_di46c2/helpdata/en/f9/c3075cac7d11d39460005004580996/frameset.htm
Not exactly your scenario but may prove helpful.
If you check in SPRO
Application Link Enabling (ALE) ® Modeling and Implementing Business Processes ® Converting Data between Sender and Receiver
Detail documentation is available for each step.