I have multiple version of Excel running on the same computer, make sure
you install the version you want to open an excel file open from
windows explorer last, or else you have to re-register that version.

I had to do that since I installed 2007 after 2003


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Regards,


Peo Sjoblom


"Ultimate Offroad" <Ultimate wrote in
message ...
I really need to save files into .wk1 but 2007 will not allow it. I like
using the 2007 version but like I said need to save to .wk1. Can I
install
2003 and 2007? If so how do I do it. I had done it at one time w/ access
97
and 2000.