After they are installed, start a completely new character.

I ran into Lonesome Road and am 2 hours into into Lonesome Road with no lag, crashes, or freezes..

I guess the game does not like using save files pre-DLC install.


I even did this at level 2 entering. With that low of a character, after each major battle I gained a level. Just tag Repair, Lockpick, and Science.

LOL, that's an acceptable solution to you? I'm a couple of hundred hours into this character and building it up is a lot of what makes an RPG enjoyable.
How about this as a better solution: instead of starting a new character, I think I'll just start a new game from a different developer and write off my $10 as a learning experience.