Reply To: Modular floor pieces, best way to make different size pieces have uv mapping for wood slats line up.

I think there might be a plug-in that allows for uv mapping multiple objects at the same time which might let me overlap the objects,

There sure is! Texture Atlas in included in Blender by default, and I cover how to use it in this lesson: https://cgcookie.com/lesson/editing-multi-object-uv-sets