6. The method according to claim 5 wherein said list is indexed by said requested file format.
6. The method according to claim 5 wherein said list is indexed by said requested file format. 11. The method according to claim 6 further comprising the steps of: accessing a portion of said optimized list ordered bound upon the requested file format; determining whether one or more of said listed file formats exists as one of said stored file formats: and selecting from said optimized list the optimal file format that is determined to exit as a stored file format.