JWeidman - not sure if you got an answer about a 10 gallon batch but what I would do is make a 10 gallon batch. Rack 5 gallons to a secondary, with the Jim Beam soaked oak chips and leave the other 5 gallon in the primary. After the "oak aging" rack them together.
Allagash states that they blend "oaked" and "unoaked" to make the finished beer. I have yet to find a clone recipe that states what quantities of each to use though. In the end your looking to find the right taste of bourbon when it gets mixed. To me both the Curieux and the Bourbon black have a nice subtle bourbon taste to them, many over do the bourbon aspect and you lose the base beer taste. So, I think your just looking for a subtle bourbon finish as the end result.