sneaky schemes and sneaky stabbin

When using skarsnik's sneaky schemes special rule, do I also roll to see if individual characters (general, bsb, wizards etc) have to enter as reinforcements? They would then have to "catch up" to the units they would normally join?


Also, in the orc magic tactica, the author states that sneaky stabbin spell gives armor piercing to missile and melee attacks, but the armybook states just melee. Is this a mistake in the tactica article, or was there a later change in the rules?


Thanks in advance.