Custom post type and permalink problem

Hi,

I just wanted to ask a quick question about permalinks on custom post types.

At the moment I have
‘rewrite’ => true,
which sets those posts to /post-type/%postname%

what I wanted to do was change this to the permalink structure used for the rest of the site, i.e /%year%/%monthnum%/%day%/%postname%/

Any ideas on how I can do this?

THANKS