1. Open existing photoshop document that has a layer with a style (fx) that I want to use
2. Select that layer
3. Create new style either by clicking on the new style icon on the styles tool panel or from the layer style dialog box...(it has a 1px stroke)
4. Go to new photoshop doc, select the layer to which I want to apply the new style
and apply style from the list of layer styles (tool panel)
The new layer now has most elements of the new style and both it and the new layer style has 4 px stroke...