1. Allow different custom template "instances" for the event info and event registration screens for a particular event on the basis of event id.
2. Allow different custom template "instances" for the online contribution page screens(Main, Confirm, Thankyou) for a particular contribution page instance on the basis of contribution page id.
Custom templates for the 3 Online Contribution screens for Contribution Page with ID = 1 would be:
Custom templates for the 3 Online Event Registration screens for an Event with ID = 3 would be:
... and to customize the Event Info screen for an Event with ID = 3:
(This feature is simliar to what has already been impelemented for profile on the basis of gid.)