Hi Jowell,
This will not be a real help. Basically what you are seeing is what I experience too. So the drop script will not work as well. On ETP deleted stuff are just moved into a trash bin folder on cr_folders. The cr_folder folder_id is -400. From what I remeber Luke P has decided for this trash bin stuff because there was something wrong with CR data model. So I think he is waiting for DanW or somebody to fix this. I am not yet good enough to debug at this kind of level nor do I have time to study right now. Although from what remeber file-storage is able to clean the cr_items, etc. cleanly. So I guess being the file-storage guy you may apply what you do there in ETP. Please post a bug fix if possible. I would like to integrate that on my mod-ETP. Not much help but I hope it does help even a little bit. Thanks.