Wintermute Engine is no longer actively developed.
The original sources are archived on GitHub: wintermute-engine and wmelite. The runtime is now integrated into ScummVM, which runs Wintermute games on current systems.
This tutorial is based solely on advice posted by NAItReIN. THANK YOU, NAItReIN!
By default the inventory is positioned at the top of the screen in a WME project. If you wish to constantly display it at the bottom of the screen instead, follow the steps.