This mod adds about 12 quests and 7 companions. Thanks to the actors, modders, and bug testers. Full credits are on the site blog.

The 3-part questline (3DNPC_FO3.esm) kind of requires a new game to make sense, but the quest can be started by talking to Dempster at the Brass Lantern if you don't want to bother. Others should have a map marker on your Pip-Boy. A few are at vanilla locations. See wiki below for more details.

Report bugs and conflicts here:
http://3dnpc.com/frequently-asked-questions/

Find wiki with RefIDs, quest IDs, etcetera here:
http://3dnpc.com/wiki/fallout-mods/fallout-3/

If you want to give me feedback, would like changes made, or just want to discuss individual mods you can do so here:
http://3dnpc.com/forums/forum/fallout-mods/

IMPORTANT NOTE:
The quests have a lot of scenes, and because there is no "Actor is Busy" or "Pause on Combat" flag in Fallout, there's a higher probability for random things to break them. I've tried to account for all scenarios and put in failsafes, but in general it's good practice not to click or shoot NPCs when a scene is playing out. Either wait for them to forcegreet or just click on one when it feels appropriate.

The vanilla game solves this problem by disabling player controls, but that's a little too restrictive I think, so for the most part I've left it to common sense. But if something seems stuck, report in the link above.