After installing 2007, run the following from the RUN command box of
windows. You may need to update the path of your 2003 excel.exe is in a
different location:

"C:\Program Files\Microsoft Office\OFFICE11\excel.exe" /regserver

Every now and then you may need to re-run. I've noticed on a PC with both,
every now and then 2007 becomes the default.

Robert Flanagan http://www.add-ins.com

Productivity add-ins and downloadable books on VB macros for Excel



"Martin" wrote in message
...
I am a teacher who uses 2003 since that is what is on the school network,
(and I personally prefer).
I sometimes have students who need to use 2007 so that , for example, they
can print/demonstrate the new conditional formatting.
I have a copy of 2007 enterprise on my laptop (for onenote and outlook)
but
every time that I install excel 2007 it grabs the xls files for its own! I
have tried installing 2003 after 2007 and this seems to work ... for a
while,
but when I run outlook office seems to 'repair' itself and xls is back to
2007.

How can I have both versions on my laptop but have the default be 2003?

Thanks.