why not just not use it?
This seems such a weird request.
Don't push the ALT button...
If you want it even harder why not try playing the game using a pair of chopsticks to move the mouse?
Wax on, Wax out..
I suspect the OP simply wants to be able to hold down the ALT button to help spot loot that's dropped after a battle (or items he himself has tossed on the floor) without it also revealing everything hidden around him in the process.
Which is understandable, but at the same time it's basically asking for his characters to be oblivious or plagued with tunnel vision.
I can understand how someone might hold down alt, see hidden keys and items revealed, and think
"well that's dumb", but only because the game doesn't do a good of explaining the whole concept to the player (i.e. "alt" represents what your characters can see from their perspective based on their perception score).
