Share 'Adding a Profile App by URL'

I would like to know if it is possibile to add an OpenSocial Profile App by URL, bypassing the Ning App Directory, as it is possibile for network level Ning Apps. In fact, I need to develop several Apps for my network, for which the following holds: - the Apps are intended to be used only by members of my network, thus there is no need to submit them to the Ning App Directory - I would like each…