Need help converting from Forza 4

JozefG

So I want to start by saying I have no previous experience modding GTA V or any GTA for that matter. However recently i've really craved some certain vehicles to mess around with and thought i'd have a go at trying myself.
I downloaded a model from Forza 4 from gamemodels.ru and converted various parts to .obj files with Forza studio.
My first problem arose when I started to gander in Zmodeler3. From my limited understanding (which could be completely wrong) i believe each part needs to be named a certain way and have a specified ID. After looking around I found a bunch of tutorials about converting to GTA IV or GTA SA but none are English and are super hard to follow. From just watching the video I thought I should start by seperating the doors from the body. When I started trying I realised I cant seem to find out how to select anything in Zmodeler (I may just be absolutely brain-dead) and furthermore I have no knowledge of how to use and apply textures in Zmodeler and I keep getting errors.

Anyway, at this point i'm pretty much on the edge of quitting this little project because I have little determination.
I would greatly appreciate some guidance and if anyone could link to a full English written tutorial I would be thankful.

Thank you, Joe

J9090

I'm going to make a guide soon touching on this issue.

Things you got right:

Parts should be named a certan way
There are non-english guides.
You can convert cars from FZ4
Separating the doors from the body

Things you got wrong

Process is pretty eazy.
Not all parts need ID's. Some need user defined properties. Mostly dummies/non polygon stuff.
Also need to separate: trunk, bodyshell(paintable polygons), door interiors, glass, high detail interor, etc.
You need to create LOD's. Polygon lowering is the method to go with.
You should import a car that is mostly similar to the car. I.E: Import staniler to Crown Vic.
You also need to fill polygons between empty spaces commonly found in the door shuts of the cars.

JozefG

The whole dummy thing is complete mind-fuck to me. Thanks for your response. I'll be looking out for your guide and in the mean time I think i'll stick to just playing.

J9090

Dummies are those green boxes you will see in all stages but clearer when no LOD's are shown. They also come in the form of green/blue cylinders, circles, etc. Those things give the car functions. I.E: Steering wheel, wheel, windows, door handles, etc. The geometry/physical stage of the car are only the looks.