Thermador - It's not a fresh install of New Vegas, no. I did do a fresh re-install not long ago, but I put the mods I usually use back in afterward. Didn't think I might have to use a fresh, clean install for TTW.
Jax - This is the output I got from the TTW installer after running it just now:
Determining system architecture...
64-bit Architecture found!
Could Not Automatically Determine Fallout 3 Location
Fallout New Vegas was found at c:\program files (x86)\steam\steamapps\common\fallout new vegas\
Tale of Two Wastelands was found at C:\Program Files (x86)\Steam\steamapps\common\fallout new vegas\
TaleOfTwoWastelands - Misc.bsa is already up to date.
Unpacking lodsettings folder...
TaleOfTwoWastelands - Meshes.bsa is already up to date.
TaleOfTwoWastelands - Sound.bsa is already up to date.
unpacking Radio Music...
TaleOfTwoWastelands - Textures.bsa is already up to date.
TaleOfTwoWastelands - MenuVoices.bsa is already up to date.
TaleOfTwoWastelands - Voices.bsa is already up to date.
Copying Fallout Music folder
Copying update music files...
Done
Copying Fallout Video folder
Copying update video files...
Done
Patching DLC .bsa files...
Anchorage - Main.bsa is already up to date.
Anchorage - Sounds.bsa is already up to date.
ThePitt - Main.bsa is already up to date.
ThePitt - Sounds.bsa is already up to date.
BrokenSteel - Main.bsa is already up to date.
BrokenSteel - Sounds.bsa is already up to date.
PointLookout - Main.bsa is already up to date.
PointLookout - Sounds.bsa is already up to date.
Zeta - Main.bsa is already up to date.
Zeta - Sounds.bsa is already up to date.
Updating DLC assets...
Fallout3.esm is already up to date.
Anchorage.esm is already up to date.
ThePitt.esm is already up to date.
BrokenSteel.esm is already up to date.
PointLookout.esm is already up to date.
Zeta.esm is already up to date.
Copying updated Tale of Two Wastelands files...
Done
And here's my load order as it stands currently:
[X] FalloutNV.esm
[X] Fallout3.esm
[X] DeadMoney.esm
[X] HonestHearts.esm
[X] OldWorldBlues.esm
[X] LonesomeRoad.esm
[X] GunRunnersArsenal.esm
[X] CaravanPack.esm
[X] ClassicPack.esm
[X] MercenaryPack.esm
[X] TribalPack.esm
[X] Anchorage.esm
[X] ThePitt.esm
[X] BrokenSteel.esm
[X] PointLookout.esm
[X] Zeta.esm
[X] TaleOfTwoWastelands.esm
[ ] NosCo Companion System.esm
[ ] ACM NCCS Companion Wheel.esm
[ ] domecity.esm
[ ] NVEC Complete.esm
[ ] Strangers Abroad.esm
[ ] The.Armory.esm
[ ] NVEC Complete + NVCE.esm
[ ] NVEC BugFixes + NVCE.esm
[ ] FOOK - New Vegas DLCs.esm
[ ] FOOK - New Vegas.esm
[ ] NVStripOpen.esm
[ ] rePopulated Wasteland.esm
[ ] War Never Changes.esm
[ ] New Vegas Redesigned II.esm
[ ] MikotoBeauty.esm
[ ] D.E.I.M.O.S..esm
[ ] DFB - Ammo Vendor.esm
[ ] Badlands.esm
[ ] JaneV3.esm
[ ] Armor Collection.esm
[ ] SomeguySeries.esm
[X] TTW_DLCMessageSuppression.esp
[X] TTW_Bobbleheads.esp
[X] TTW_MoreCookingItems.esp
[ ] TTW_ReadiusCompatibility.esp
[ ] TTW_NoKarmaDCFollowers.esp
[ ] TTW_TQLSkip.esp
[ ] T6M Old World Blues Replace.esp
[ ] T6M Dead Money Armor.esp
[ ] T6M Female Power Armor NV.esp
[ ] T6M Equipment Replacer NV.esp
[ ] T6M Under Wear.esp
[ ] Mission Mojave - Ultimate Edition.esp
[ ] NVEC Enhancements.esp
[ ] NVEC Complete FOOK Patch.esp
[ ] NVEC Complete NVR2 Patch.esp
[X] DarNifiedUINV.esp
[X] CASM.esp
[ ] desmond companion.esp
[ ] DFB - Ammo Vendor - Caps to Money.esp
[ ] DFB - Ammo Vendor - Dead Money.esp
[ ] DFB - Ammo Vendor - Honest Hearts.esp
[ ] Sheriff Meyers.esp
[ ] housemod.esp
[ ] Armor Collection - Armor Cabinet.esp
[ ] MikotoBPWastersOverhaul.esp
[ ] ReElijahfied.esp
[ ] Brotherhood and House Alliance.esp
[ ] NewVegasStripOverhaul.esp
[ ] Niner.esp
[ ] PSSignRemoval.esp
[ ] Schoolhouse Base V2.esp
[ ] Boondock Saint DEK.esp
[ ] Firefly_guns.esp
[ ] SWAT Armor.esp
[ ] Owen ArmorBerets.esp
[ ] Type3MClothing_HH.esp
[ ] Type3MClothing_OWB.esp
[ ] Type3MClothing.esp
[ ] Type 6.esp
[ ] T6M Combat Armor NV.esp
[ ] The New Bison Steve Hotel.esp
[ ] ContrerasMapMarker.esp
[ ] HTRP-Vendor Supply Refresh.esp
[ ] HTRP-Daily Vendor Restock.esp
[ ] FOOK - New Vegas.esp
[ ] 1nivVSLArmors.esp
[ ] FOOK - New Vegas DLCs.esp
[ ] CONELRAD 640-1240.esp
[ ] WPR.esp
[ ] Bobbleheads - Cases.esp
[ ] Bobbleheads - Cases_v1.2a.esp
[ ] Bobbleheads - Hidden_v1.2.esp
[ ] Bobbleheads - Not Hidden_v1.2.esp
[ ] NewVegasBounties.esp
[ ] NewVegasBountiesII.esp
[ ] War Never Changes.esp
[ ] War Never Changes - Seven.esp
[ ] CompanionDe-Equip.esp
[ ] Companion Sandbox Mode3.esp
[ ] mojave music radio expanded v1.1.esp
[ ] SaveCass.esp
[ ] christinecos.esp
[ ] 1SBSteamOutfit.esp
[ ] bzArmour.esp
[ ] ReworkStuff.esp
[ ] OWB Companion Teleport.esp
[ ] OWB Moddable FIDO.esp
[ ] OWB More Vendor Caps.esp
[ ] OWB Stealth Field Suit.esp
[ ] OWB Valence Extra.esp
[ ] OWB Valence Mask.esp
[ ] VegasOutfits.esp
[ ] NVR- Lore version.esp
[ ] NVR- Recommended.esp
[ ] New Vegas redesigned- Honest Hearts.esp
[ ] MMUE-CP-rePopulated.esp
[ ] GRA - The Right to Bear Arms -Vendors Untouched.esp
[ ] A Present For Boone.esp
[ ] cOMBOhEADGEARallDLC.esp
[ ] Follower Home Marker.esp
[ ] Light Step ED-E.esp
[ ] LosIlluminados.esp
[ ] RexCyberPoliceDogRetex.esp
[ ] MercWanderer.esp
[ ] NVWillow.esp
[ ] QuickHacking-NV-FullXP.esp
[ ] SunnyCompanion.esp
[ ] 101Billboards.esp
[ ] 101Posters.esp
[ ] MiscItemIconsNV.esp
[ ] T3T_MiscItemIconsNV.esp
[ ] Tactical Transportalponder.esp
[ ] The.Armory.Cabinet.Addon.esp
[ ] The.Armory.CaliberX.Patch.esp
[ ] HonestHeartsCheats.esp
[ ] EVE FNV.esp
[ ] MMUE-CP-EVE.esp
[ ] Expanded Traits - Perks.esp
[ ] Fellout.esp
[ ] Fellout-OWB.esp
[ ] FNV Vanilla hat fix with all storyline DLCs.esp
[ ] friendofnightforfellout.esp
[ ] Gunslinger.esp
[ ] BetterGamePerformanceV4.esp
[ ] bald.esp
[ ] Receding Hairstyle.esp
[ ] MikotoBeauty.esp
[ ] StripOpenMain.esp
[ ] yao guai animal friend perk.esp
[ ] Freeside Open Patch.esp
[ ] TheInheritance.esp
[ ] JTRS.esp
[ ] A Better Arcade.esp
[ ] A Better Boone.esp
[ ] A Better Cass.esp
[ ] A Better Veronica.esp
[ ] HV Mag 2.0.esp
[ ] OwenHomev02.esp
[ ] Boones Spotter Perk - Yellow.esp