The one another option you can consider if you want to share the same Sender System + Sender Interface ( IDoc ) across multiple ICO is to use the Option - Sender Uses Virtual Receivers
This will work for a NON LS Sender Partner Type / Receiver Partner Type/. If you do this, PI will look at the Idoc control record and check if the RCVPRN / RCVPRT have a corresponding Party in PI and then check for ICO using this Party.
To enable this featute you can refer to this thread : Separation of iFlows using iDoc party setup? PI AEX Do note - if you enable this feature using the SAP note: http://service.sap.com/sap/support/notes/1941832
you will impact all running scenarios. Read through the discussion in this threads in its entirety to understand this better ( if this is what you need! )
Regards,
Bhavesh