When you go into the applications section of the LSAC website, you will first choose the school's application that you wish to strt working on first. Fill out their basic application forms, save them, and then there is an option below these forms to attach documents. this is where you can attach resumes, addendums, PSes, etc. Once you upload them to one application, the same documents will be available to attach to other applications as necessary, so if you have different PSes for each school, make sure you label them appropriately so you don't get confused. Good luck.