ok so i got this game for xmas and it rules. i am having trouble getting to gnr. i can't get to it. its surrounded by bombed out buildings. i went into the subway at furragut and came out at friendly station took out the raiders at the abse above the station and then went around the general area killing stuff and nothing. i try to follow the trail on my mpa, but it leads me into walls and stuff. can i get some help?