Hi, I just got Lonesome road for New Vegas. I found the entrance of sorts (scraps and a sign saying Lonesome Road and anotherone telling the Courier to go back). I can't seem to click anything though, so I can't seem to activate it. Anyone has any idea on what went wrong?

You should have a quest called "The Reunion" and the game will let you know after you get Lonesome Road.

So, chances are you don't have it.

No idea what went wrong. Just wanted to make sure you knew the side door on the ruined bus is what you have to activate in case it was unclear. Maybe try re-installing the download.