Re-texture of a car prop asset, need help

[kwetzel345 101]

Hello everyone,

So recently I have been able to figure out how to re-texture buildings, quite proud of that, but have decided I want to move on to something new. That new thing now being car models. My most recent project is the street sweeper model by ninjanoob slayer. I just want to remove the marking and I just want a prop version of it, however upon doing so(after modifying the d file and the psd file, since that have marking on it too), the model always loads up like this.(pic below). My questions are as the flowing:

What is the culprit with this?.
what is a a psd file needed for? 
 if I am correct, I use one or the other, right?(fbx or obj, there just different file formats of the 3d object itself I believe) 

[Vilgard 0]

it seems this is the LOD of your car on your Screenshot. So you need to modify the lod_d file

[kwetzel345 101]

huh,alright

Tho the only files I got from him is is as follows:

_s.png
_n.png
_i.png
_c.png
.png file
_d.png
model name obj
model name fbx
.psd

So do I create one myself then?. I would guess right?.

UPDATE:I did create one, seeing there wasn't one,  but it did nothing in regard to the issue above. Still imports with blurry textures.