Hi,
I checked into this in more detail - it's a bit awkward allowing item use by now, since there are a lot of special cases (such as items that have side-effects) to take care of. For example, the dungeon warp scroll would make your actor cast the teleport spell, but to do that, I'd need to make you stand up for the animation to show. It's really a lot of trouble, and I don't see an overwhelming interest in getting this changed to justify the development time I'd need to spend on this.
Toby