The radio broadcast reaches to about Helios One and needs to be listened to for the quest to start
Honest Hearts
The radio broadcast reaches down to Freeside and needs to be listened to for the quest to start
Old World Blues
The radio broadcast has a fairly small radius around the Mojave Drive-In, and once you pick up the signal, the quest is started. Once you complete OWB and return to Vegas, the radio broadcast will regain its vanilla Mojave-wide range, for those who like the music
Lonesome Road
Completing the other 3 DLCs’ main quests will automatically start the quest with a message from Ulysses, but you may also simply walk to the Canyon Wreckage to begin the quest whenever you’d like
GRA/Pre-Order Packs
There’s nothing to start, but the mod removes the popup messages informing you the DLCs have been installed
Starting Fallout 3’s DLC
The Pitt
The radio broadcast reaches to about Oasis and needs to be listened to for the quest to start
Operation Anchorage
The radio broadcast is active within the ruins surrounding Bailey’s Crossroads and needs to be listened to for the quest to start
Broken Steel
Automatically starts after completing the main quest (note that TTW 3.3 plays the original game’s ending if you complete it in Hardcore mode and activate the purifier yourself)
Point Lookout
Walking south past the Citadel should start the quest when you get close enough to the Riverboat to hear the ship’s horn
Mothership Zeta
The radio broadcast reaches to about the Scrapyard and needs to be listened to for the quest to start