harush on "Custom post type - creating custom content?"

Hi,

I got a plugin with a custom post type and I would like to control that content is displays when accessed. For example: I got a music post type, so when people access its URL (let's say http://www.example.com/music?daft-punk) I would like to have a unique content displayed just before the real post's content.

Is that possible? If so, how can I do it?