URGENT: Migrating Locally Managed Tablespaces to DICTIONARY!!!!

Dear all,

  By "error" I created tablespaces (including SYSTEM) to be LMT... unfortunately the customer does not allow this at this point, I MUST "migrate" (someway) to DMT, any suggestions? I MUST migrate two instances totaling about two terabytes in possibly 24 hours or not much more..... I don't have enough resources to do an export/db (re)creation and import in 24 hours.

Thank you all!

PS Hardware platform is a HP Integrity Superdome partition

     with 4 procs 16 gigs ram (IA64) with Symmetrix storage.

-- 
Antonio Dell'elce
   http://www.dellelce.com/MyHome/