Controlling delete per lifecycle

We currently have over 100 engineers using PDMWorks. In the"Design" lifecycle we want the engineers to pretty much have fullcontrol of their projects. Once a document is pushed to the nextlifecycle, we limit what the engineers can do to the files.Currently only the Administrators can delete files, which you canimagine is kind of difficult for supporting so many engineers. Wewant the engineers to be able to delete while in the "Design"lifecycle only. Is there a way to do this? We were able to allowrenaming only in the "Design" lifecycle through some customprogramming, is there a way we can do the same for delete?SolidworksWorkgroup Pdm