Open the XLS file you wish to convert in Excel. Click "File," then "Save As." Select "CSV (comma delimited)" from the "Format" drop-down menu in the save dialog that appears, and click "Save." ...

Go to the File Types tab, scroll down to Microsoft Excel Worksheet (.xls not .csv) and click Advanced. Uncheck 'Browse in same window' (or 'Open Web documents' in place) and OK.

IE7 now opens CSV files natively, despite CSV being associated with Excel in Windows Explorer. How can I get it to call Excel to open CSV files, without having to Save the CSV file and reopen it? A.