Thanks to R.K. McSwain I know that finally the ScriptPro update has been released to support AutoCAD 2007/2008 based applications as well as Windows Vista. It really is no change to ScriptPro since 2003 but now the installer works. You find it here: http://www.autodesk.com/migrationtools
Speaking of scripting you might want to consider SmartPurger. Not free as ScriptPro but with somewhat more functionality.