I have a very large mesh but want to make a smaller version. I want one about 1/1000th the scale so as you can imagine a lot of detail won't be seen. Is there a filter or an operator that can do this for Morrowind nifs? Or even an Oblivion one and then I could just convert it.

You need to use a modeling app, but in any good one (Max), there is an optimize modifier. Usually it's not so good, but if you're converting something to that small a scale, it won't be a big deal.

Thanks, peachy. I'll have a look through Blender's doco. I wasn't sure if all those verticies would be overlayed on a shrink op.