The fundamental problem is that Characters and Items use completely separate types of templates. Summon spells (capable of summoning a copy of any Character in the game) will cause a Crash To Desktop if they attempt to summon an item instead (I've tried this).
The work-around for this type of idea would likely involve Scripts, since those are capable of spawning/teleporting players/items around.
That being said, I'm now curious... what happens if a Summon spell attempts to summon a Player?
Edit:
Summoning a 'Player' (template) does as much as one would expect-
I don't think the answer to this type of mod would lie in Skills of any type; Summons are just too hardcoded to be the way they are.