The first thing is to open the TES Construction Set, or CS as it will be called from here forward (I'm assuming you have already installed Morrowind and the expansions Tribunal and Bloodmoon). Need to know how to create an interior in the TES III Morrowind CS? Look no further! This guide will aim to teach you everything you need to know when creating believable interiors for use in your own mods or perhaps a showcase for one of the Project Tamriel mods!