Best Practices Saving & Viewing Released Draw Sets

Please help New to PDM Works. Lets say I have: 1. Widget AssyVer1; 10-15-07 Drawing Set Released to production. Almostimmediatleywe begin revising and changing Widget Assy and thenrelease WidgetAssy Ver 2; 11-15-07 I now on 12-1-07; need to lookat the completedrawing set of Widget Assy Ver 1 10-15-07.for spareparts andWarranty issues. My engineers/drafters say they have noway to keepthat "Snapshot" of the widget as the drawings fromthatset have been revised and changed and ar in fact workingonVer.3Are we not using PDM Works properly or do we have to go toPDMEnterprise to track an dkeep those archive or old drawingsets.ThanksSolidworksWorkgroup Pdm