Controlling transparency on the Add Map Layer function

Firstly - I like the new "Add Map Layer" functionality, it works pretty well. The only thing that is holding us back from using it more than what we'd like is the non-ability to control the transparency of the added layer/service. We have transparency set in the mxd that is published and available as a map service that can be added, yet upon loading the transparency is lost. As all dynamic layers get added to the top, it would be great if the transparency was respected. Or the order of drawing be configurable - but that sounds like a tough one..!!

regards

GF