I'm not sure if I did something wrong, but from what I can glean from reading this site, I'm only realizing now that I should have started out in the Capital Wasteland of Fallout 3. Instead, I seemed to have started in the Mojave as you normally would in vanilla Fallout: NV.
The weird thing is that I'm only just realizing this now, as I was able to travel from the Mojave to the Capital Wasteland just fine using the train station. The Fallout 3 DLC quests even only triggered when I entered the Capital Wasteland... I only figured this out when I ttried to see where to go pick up the Fallout 3 main quest.
I read somewhere on this site that it's not a good idea to use a custom race, but I am, so is this bug related to that? From all I can tell, A Tale of Two Wastelands installed propperly - I even get the banner on the main menu.
*I do appoliogize if this should be in the Technical Support section, I wasn't entierly sure where it belonged, since this isn't a hardware issue or an issue of the game not running. All the content seems to be there, I just started in the wrong place!