Help with Drawers

I am looking for help. I've received 50 (yes, 50!) high quality drawers. They were built at a high end furniture factory, have never been used, are unstained and have face frames already attached. Every plan I read has you build the cabinet, measure for the drawers, then build the drawers. I am attempting to build backwards as I already have LOTS of drawers to use up. I am unsure how to go about doing this - especially since the face frames are attached in such a way I cannot remove them. Any helpful tips would be extremely appreciated. As for specific plans I want to use - I don't have one. In fact, I really don't have a use for these drawers but really enjoy the building process! If a specific plan is needed to give me advise - perhaps you can choose one? Thank you in advance.