Version: Taller DC Skyscrapers v3.0
I have a present; I've found this little-known gem on Fallout 3 Nexus and had to put it into Tales of Two Wastelands. It's called 'Taller DC - True Skyscrapers' and it was created by a fellow called naugrim04. This mod adds skyscrapers to the DC City Ruins adding a tremendous amount of atmosphere to the game (and makes it ACTUALLY feel like a gods-for-honest city).
In the current version, v3.0, a lot of changes have been made to the visual appearance of the DCRuin Worldspaces. A lot of varied, and quite different, buildings have been added to make the place feel like a true post-apocalyptic city. The effect the latest changes make is pretty huge compared with both vanilla and the previous versions.
I'm not 100% sure if the changes will be everybody's 'Cuppa-Joe' so I'll keep v2.5 available just in case. It's a quick conversion and clean-up, I haven't had much chance to test it because my attention is focussed elsewhere -- IRL(tm).
Whilst you're trying this mod out, please don't forget to show the actual creator a visit on his mod page: http://www.nexusmods.com/fallout3/mods/20540, post a comment if you wish and most importantly endorse his mod (and yes, I have naugrim04's permission, you'll find it in the comments section of his mod).
Also, if any weird LOD things pop up, let me know, I'll try my luck at fixing it; but please be aware that my experience with LOD generation is very limited.
This mod contains custom LOD mesh (just for buildings) to make the skyscrapers appear; so please back up your existing LOD (in meshes\Landscape\LOD) just in case it doesn't work properly so you can roll back.
If you don't want to use the custom LOD you will need to extract the contents of the mod and delete the meshes folder, then recreate the archive before using it (but you won't see the skyscrapers at a distance).
Texture packs should not matter because it uses the vanilla LOD textures provided with TTW.