Using multiple ledgers in FA

I would like to set up another corporate fa book but link it to the secondary ledger for Germany.  This way my team would be able to track items the government requires to be tracked as assets but our corporate policy for US report does not consider assets.  If I can put in another corp book and use the secondary ledger this will be easy to do.  Problem in I cannot attach to any ledger except the primary.  Any suggestion?