Networked deployment of multi-application customizations

A user node receives a multi-project solution which includes customizations that collectively extend installed applications. The customizations are installed on the user node as a single solution from an end-user perspective, e.g., by displaying a single progress update bar, displaying a single entry for the multi-project solution in an add/remove programs control, and making a single trust decision for the multi-project solution, as opposed to individual displays and individual trust decisions for each customization. Deployment may invoke an enhanced application manifest, an enhanced deployment manifest, or both.