Change event type URL seperation

Hi,

Our site provides listing for a variety of event types. We’d like to display this event type before each event.

Currently we have this structure:

/event/%postname%

If we enable event types, we get the following structure:

/event/%event-type%-%post-name%

We’d like to change the dash to a slash, and hide “event”. like the following:

%event-type%/%post-name%

How can we change this?

The page I need help with: [log in to see the link]