[Seaside] Multiple entry point best practices

[Chad Nantais]

I'm building an application that will have different entry points.  It
will be structured like this:

main (MYMainComponent)
-users (MYUserComponent)
-photos (MYPhotoComponent)
-places (MYPlaceComponent)

This will allow users to bookmark, say, a photo with a url like
'/seaside/myapp/photos/243'.

I need all four to share the same application header, footer, and
session so that it's one continuous application.

I seem to have two options:
1. Create subdirectory entry points for each
2. Override WARenderLoopMain>>start: and create rules to dispatch
requests to the right component.

What's the smartest way to do this?

In the case of #2, I don't know how to extract the component subdir
from the url (eg: 'photos' in /seaside/myapp/photos/243).  I only know
how to get field values (eg: id=243).

Thanks in advance for any tips.

Chad