GTAutil - Stream clothes - I need Help

Hi guys, excuse my English if it’s not so good. I want to stream clothes on a server and discovered GTAUTIL. Unfortunately, I have some problems that no one has been able to answer yet.

→ Each clothing above the 15+ slot has only 1 texture, although the model has 6 textures.
→ Sometimes more textures are displayed than the model has
→ I want to insert the clothes additionally, not overwrite them
→ I want to have the clothes in a folder, how do I deal with the JSON and YMT file?

I hope you can help me. And explain GTAUTIL to me in more detail