How to modify title like we can modify body with contemplate?

Hi!,

I'm using drupal 6 and i have created a content type in which I'm using CCK and contemplate to create a output of the body field depending on two fields that I have created.
I want to do the same with title, and make that Drupal don't ask user the title when creates this type of content, but it's no the most important thing.

Something like contemplate to edit title?
I'm not afraid of programing something, but I'm a noob with Drupal :P.

Thanks and sorry for my english!!