I'm having texture problems here ( I am new at this) and I need help

Alright well I am making a mod that lets you use normal flask instead of the sparse bottles that Vampiric Hunger uses. I just cant Understand why he didn't use the regular bottles so I decided to make them. Problem is that I want to make it compatible with qarls flask mod.

I tried using the old blender that has a python script plugin, my computer didn't like it and the newest blender is easier to use.

So I used nifskope to open the nif files which I then exported as .obj files

What I did was I made the blood object in blender I colored it and I placed it in just a way where the object I made would go right inside the bottle when I added it in nifskope.

Problem is for some reason I can't get textures from blender into nifskope and I don't know how to attach them to the actual object I made for the bottle.

Please, help.