So, I tryed once more. The same thing happen - missing texture all around, and adboards textures on the pitch. I'll try to describe steb by step what I did, so you can have better idea what I did wrong.
At the begining I have 2 folders - one is your converting pack, the other - mine folder with Zorrilla .cmp. I extracted the 3 m716__xxx__x.o files from Zorrilla in my folder. Meanwhile I created new folder, where I was suppose to put the stadium.oif file (I named this folder "stadium v2")
And then I started the Oif tool.
I choose in Model type - Generic Model
Clicked on Export from .o, and in tab "from" - I choose m716__xxx__0.o from my extracted files.
In tab "to" I choose my folder "stadium v2" and saved the .oif file as "stadium". Then - "continue" and a .oif file is created.
Then I clicked on "import into .o". In "from" tab I set the stadium.oif, which I created.
In "to" tab I choose again the same m716__xxx__0.o and an "overwrite" message appeared - I clicked OK.
In "Base" tab I set your file 10_template(alpha).o and clicked "continue".
Another window appeared and I clicked on "load pasn" and loaded 10_template(alpha).pasn. Then - "continue" and the .o file was created.
I repeated all the steps for the rest of the .o files of Zorrilla. The only thing when I repeat the steps for the other files is that I overwrite the stadium.oif file I created the first time.
I hope I've explained it good enough, so you can tell me what's wrong. I don't know how to make a picture from the game, so you would have better view of the problem. Cheers, my friend!