We recently began replacing our XP workstations with Window 7 32bit and 64bit. On the XP machines we primarily used DWG TrueView as the default preview in EPDM for DWG files. We successfully change the default preview on the XP machines using the "UseeDrawingsForDWGPreview_70.reg". This punch does not work in Windows 7 and I have not been able to change the default preview to use anything but eDrawings. We are currently using EPDM 2011.