Help with Invisible Servants and Alchemy

[dwlc2000]

So i have a question, if you cast the spell servant horde (which conjures a lot of invisible servant people) can you instruct them to make alchemy items because you know how to make the item? cause i really want to mass produce liquid pain. It's a drug in book of vile darkness that supples 25xp to magic item making, and my 34th level wizard really depends on it.

[Flickerdart]

"[An unseen servant] can’t perform any task that requires a skill check with a DC higher than 10 or that requires a check using a skill that can’t be used untrained."

[Dumbledore lives]

Invisible Crafter is the spell you want, from Races of Erberron. There is a mass version as well I believe.