It would not be pleasant to event a target item scene, but it is possible. It would require picture eventing. A great resource for that sort of thing is just looking at 2k3 games, as a lot of fancy stuff is done with picture eventing. I wrote a tutorial for that kind of thing once at RMRevolution, but I don't remember if it ever made it to rmrk before RMRevolution was taken down (not RRR, by the way). The basic idea is that you take a picture of the windowskin, enlarge it to the size you need, and that would be one picture. You then draw it, and for each item that can be unidentified, you would want a picture of it's name and Icon. Then, you would check each if they were in inventory, and you would draw it. There are a number of ways you can reduce the number of conditionals that would require, if you're clever, but it is a tough event system to write efficiently in any case, and it could never be plug & play.
If you do want to use a script, I would suggest you simply use my Evidence script in the database and list all identifiable items as evidence.