My first post as a new member of the Forum! I am upgrading my OS from Windows XP to Windows 7 32-bit, and may not be able to use my AutoCAD 2000 Lt after the upgrade. Is DoubleCAD XT v5 fully compatible with Windows 7 32-bit, or will an XP virtual OS or some other add-on be required? Also, will I be able to open and edit my old AutoCAD 2000 Lt .DWG files in DoubleCAD XT v5 ? I have read the System Requirements etc. for DC XT v5 and am just checking to make sure.