I suggest you view the profile of the person who is offering you advice to see if perhaps their comments are not indeed meant as sarcasm. (You could threaten to rat them out if they don't tell you the secret of the mystery, but the real secret about Tremulous is that if you're not cool enough to get it to run, then you're not cool enough to play it. Sorry, your friends just didn't have the heart to tell you, but since we're just faceless people on the Internet and we don't have to see your crushed hopes and dashed joy with our own eyes, we'll give you the real story.) Maybe if your friends see you make an effort to google it they'll help you. OK, now search away, and don't be afraid to ask questions in the Troubleshooting forum.