setup info for model Hunyuan 2.1 #5

The install page says you can use Hunyuan 2.1 but does not say where or how to configure the model dirs. Is there a software setup requirements or hardware requitements like recommended or minamum amount of vram ?

How do you choose between 512 and 768 texture size that is mentioned on the project home page both? Is it possible to go higher like 1024 which is common size for Hunyuan texture generation or even more? probably there is some limitation like hallucinations or vram or too long processing time and the texture engine breaksdown ?

Are there other models that can be used to generate textures instead of Hunyuan 2.1 ?