I've installed modded morrowind according to http://btb2.free.fr/morrowind.html and I noticed that when an imperial takes out his sword I get this error message:

TES3Stream Warning: Model
"Meshes\w\W_Broadsword_Imperial.nif" tex not
found
"TX_W_Imperial_Broadsword_blade01.BMP

Continue running executable?

Since it took me quite a while to install all of the mods on the list, I am a bit worried that I'll have to reinstall everything from scratch..

I had the same issue when I installed Darknut's Weapon Textures..which looks like the same mod included in BTB's List.

Find the imperial broadsword texture and mesh in the darknut weapon mod folder, and try dragging and dropping them into their respected places in the data/meshes and data/textures folders

http://planetelderscrolls.gamespy.com/View.php?view=Mods.Detail&id=6143k you need to download the mod separately.

Did you install the texture files themselves into the root directory, or did you just copy the "512" or "1024" folder into the textures directory?