Trouble with custom models, need tutorial

[Mr Robville]

Ok, I finally managed to get the models fully working ingame.
It seems that all textures must have an equal resolution.
that means that textures with 300X400 pixels or 530X890 pixels don't work, only if you change their resolutions to 512X512 or 700X700. it must be absolute squares.

so the .mat trick hasn't been used.
I kept all textures in .PNG format. result:




Thanks a lot for the kind help all!