Change all parts at once in model manager

Dear,

in my company we are usen creo elements. If we are designing our structures we save our assemblies to windchill with Model Manager but leave the "part action" on "none". So actualy we don't make a fysical part in windchill. When the design is finished, we make parts from it in windchill by putting part action on "create automatic". Now is my question: how can you change all those parts/assemblies at once? Now we have to do it part by part (and if you have a over 1000 parts, it could take a while... ).

Thanks in advance!!

Grtz, Tom