Did you try to install an ipk package? This belongs to /tmp

What is the error message?

i will ask again, what would you install, a ipk package or a all single files?
/tmp is only for offline installation of a ipk file.

Do you want to install a skin? Or simple copy all files?
/usr/share/enigma2 is the destination for the skin png and axml files. But some skins include python files wich belongs to some other folder.