Image/File uploading plugin modification -- 2

NB: Full Project Brief Including Images In [login to view URL] (Attached) We require a file uploading plugin/script that can be easily modified to meet our requirements. We have been looking at an existing plugin that could potentially be modified to create what we need ( [login to view URL] ). The primary use of the plugin will be to upload images & save them in a temporary folder until the user submits another form with other inputs. When the form is submitted, the user completes the process, the uploaded files (in the temporary folder) should now be saved to a destination folder of our choice. We should be able to easily change the location of the temporarily uploaded images & be able to easily add additional PHP for post uploading processing such as creating thumbnails & inserting uploaded file information to a database etc.