Staged payments in sage 200c

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Does any of my fellow sage 200c users ever done a staged payment in sales order processing 

So i have 4 stages i have to invoice at but 2 of the stages are where no goods will be despatched, i would prefer not to do a seperate free text line for the values because it will show each part sold as a minus profit on closure of the sales order

I looked at the payment with order tab within the sales order but have been advised that this is for 1 payment only and will not allow any additional payments with order.

So can someone help/advise please?