Pageroute adding invite and other non-node pages to pageroute

Hi,

is there a way to add a site invite or contact page to pageroute?

I was thinking of two use cases:
1. i created a profile wizard to help setup multiple profiles. It would be nice to be able to add an invite your friends page
2. i created a wizard to create an event. It would be nice to add the rsvp page after you edited it. the rsvp page for an event is node/nid/rsvp

I thought I could do this with the node display page by using 0/rsvp but it did not work. I am not quite sure if the display page can be used for anything but displaying the node.

Thanks,