Posting from a Tax Book instead of a Corporate Asset Book

Good Afternoon,

I have a client that would like to use TAX related functionality as its CORP depreciation method (eg.  they want to apply the Tax Ceiling functionality for Luxury Autos to the GL).  The functionality is ONLY available in the TAX books.  My question, can someone create a CORP book and NOT post the corporate book to the GL.  The create a TAX book and post only that book to the GL.

It looks like the Book Control to "Allow Posting to GL" (R12.1) could be unselected for the CORP book and selected for the TAX book.  Has anyone tried this?