Modifying display and usage of comments

Hi all. I'm new on drupal and I'm really enjoying it! I need help, though, with modifying the way comments are being displayed, and used. My project involves creating an advice room: i.e. one user asks a question, then others reply (more like forums, but a little different). What I would like to change is, instead of displaying "Number of comments", i should show "Number of replies", and instead of showing "Add new Comment", i want to show "Click to reply"! Any assistance?