Saving a Solidworks 2008 file as a Solidworks 2007 file

SF 2008-05-12

I received a Solidworks 2008 file and wanted to save it as aSolidworks 2007 file because I have Solidworks 2007 on my sytem. Ihave done the same in AutoCAD and wanted to do the same here. Anyhelp is appreciated.Solidworks General