PSCD Revenue Distribution- One Source payment multiple targets

Hello,

We have a scenario for PSCD where we need to offset/distribute an over payment from one Business Partner (BP)/Contract Account(CA) to multiple Business Partners/Contract Accounts(CAs) as the BP/entity is the same so then we don’t want to process the refund and ask another payment . The system should automatically process the overpayment, distribute it to CA and should have an audit trail in the system for the distribution as well as options for reversing back the amounts

I have explored the following options

Transfer Posting (Transaction FP40): Transfer Posting does internal sub ledger transfer and does invoke the GL transfer. Also it does not allow transfer the overpayment to multiple contract accounts

Revenue Distribution (FP60M): This is the option we are currently exploring as it allows to distribute payments to multiple contract accounts. I need help if revenue distribution can help achieve this. Any input /existing guide will be appreciated. Pasted below is the scenario and outcome needed

I have configured the system as per the two links. However the transaction FP60M does NOT generate proposal even for single source Contract Account (over Payment ) to distribute to single target accounts. If some one has a guide I with a step by step process it would greatly be appreiciated

http://help.sap.com/erp2005_ehp_04/helpdata/EN/23/8b623c1b69746de10000000a11405a/frameset.htm

https://archive.sap.com/discussions/thread/1494003