I am able to run 2000 and 2007 on the same machine ok except for the following

The File Type associations are messed up. I have a bunch of files that were created in 2000 and they have the *.xls extension. I want these files(when double clicked) to open in Excel 2000. However, Excel 2007 is dominating this action.

I have tried changing the association for the *.xls file type to version 2000. That did not work. I tried deleting the association for the *.xls file type and making a new one for the 2000 version. That did not work.

Please help.

Dennis