In Documents\My Games\FalloutNV\FalloutPrefs.ini and Fallout.ini :
: This is widely considered the "final" stable patch for the game. It includes significant engine optimizations for memory management and AI pathing, and is the baseline required for modern stability mods. The 9 DLCs Included Major Expansions Dead Money Honest Hearts Old World Blues Lonesome Road Equipment Packs Gun Runners' Arsenal Courier's Stash (which itself contains four smaller packs: Why This Repack is Favored Lossless Repack In Documents\My Games\FalloutNV\FalloutPrefs