How do I create pages

[eluser]JasonS[/eluser]
Sorry for the rather dumb title, my mental facilities are somewhat depleted on a Friday afternoon.

Currently this happens. (I think)

page is routed -> router looks for controller -> if controller doesn't exist throw 404.

I want this to be modified to the following.

page is routed -> router looks for controller -> if controller doesn't exist load the page controller

I assume this has been done many times before. Is anyone willing to share what they have or could someone tell me which system library / function would need to be extended.

Thanks,

Jason