Following the inventory idea I'm keeping with my current 'lost long Myst features' trend and moving on to the cursors. One of the things that was nice in the Myst games, was that the cursor could totally change depending on the circumstances; if you were holding an object, doing a specific action etc.
Would it be possible to change the cursors? Without changing the actual client code, just a good old PRP/Pak mod.
Alternatively: would it be possible to add something next to the cursor? (keep the current cursor but add a texture/GUI that would follow its coordinates)