Activate P4S Features for SharePoint 2007
Presto Add-On for SharePoint (P4S) adds specific actions to SharePoint farms and sites. It also defines a Mashup Site template which you or users can use and adds two new Web Parts for mashups and apps respectively.
To begin configuration, you must first enable P4S features for each SharePoint farm and site collection where users should be allowed to work with mashups and apps. See these topics for instructions: