I have recently loaded Office 2007 on to my computer retaining all of Office 2003 that was there before. I want to open my Excel files with the 2003 program, but when I double-click on the file, 2007 opens it. I tried right clicking on the Excel files and clicking on "Open With" to no avail. It ignores me and will not bring up 2003. I've tried that with Excel 2003 open, closed, along with 2007 open and closed - no difference. I had no problem assigning Word 2003 to open my old Word documents, but Excel does not work the same way. Any suggestions?