my first port of call is to locate Jeff Renner (i am sure Jeff is now a board member of the AOB) and he will fill you in on everything to do with using rice.
For a home brewery it is simple, boil for 20 mins and add into the mash. For a larger requirements a cereal cooker, which can be obtained commerically, can be obtained.
If you cannot locate jeff, drop me a line at email@example.com and I will send Jeff a note.
Jeff has been the tour-de-force of the (in)famous CAP, is a pure gentleman and one whose wisdom on adjunct brewing is beyond question.