AutoCad :: Xref Layers / Layer Filters

My company uses tons of Xrefs - wonderful, however problem comes when having to navigate through 100's of layers to get to the main drawings layers. So I tried using the layer filters to just show my main drawings layers. Here is the problem, I you can select show all layers, not good, can select just the xrefs (show all of them or show just one of them, etc...), or you can show just the used layers - I tried that, but when you create a new layer it is not included in that filter. I tried setting up a custom layer filter, however, I don't know how to right the name or what selection to make that would allow me to exclude a set of layers.