There will be a problem having the topmenu in a link to the order, but with the following link you will be able to get a specific order i CM: /Apps/Shell/Pages/ContentFrame.aspx?_a=Order&_v=PurchaseOrder-ObjectView&id=ORDERID&customerid=CUSTOMERGUID
That is what we are using right now, the customer is just complaining that they loose the cms context.
I am looking into the commerce manager siteplugin if i can make some hacks there. I can see i can add en EntryCode parameter so if i could modify that in some way by setting the Framesource via reflection through an http module or something similar.
We have a custom gadget that displays an overview of orders that has a certain state. We would really like to link to orders so they open the purchase order in commerce manager but still shows the cms topmenu, just like when you click commerce manager and manually navigates to an order, is this possible?