Thanks Trooper119. I saw that you still use A5 standard. So you probably cannot use any normal maps at all. But I think about creating old-school color maps with baked lighting as an alternative for the modern shader textures.

With that in mind the user can decide what package fits his / her needs.

By the way: You will see - that this is no magic at all. It is not that complicated when you once got into the tools.