[Johan K]

I saw a little problem in the mod:

#armor full chain mail 18

should be

#armor "full chain mail"

and it's the same for weapons. Use "" or numbers, not both. Although it won't hurt to put numbers afterwards it won't do any good either.

There is a typo in the modding manual for itemslots, the precalculated values at the end are wrong. This is probably what you want.
#itemslots 13446 (= 2 hands, head, body, 2 misc)
But you can leave that command out and give your knight a #mounted command instead which should remove his feet slots too.