Seems like the Fallout 3 Stutter fix will come in handy, much like in Oblivion, it's one of those annoying issues with the engine, ruins the games immersion massively!
Frameskipping , Stutter Fix Released! Though it's WIP
http://forums.bethsoft.com/index.ph...-bethesda-softwares-game-stuters/page__st__20
Read this member's post ( last post #31 )!