If you want both, the usual recommendation is to install 2003, then 2007.
--
David Biddulph

"Mary" wrote in message
...
I am having problems running certain programs made in 2003. They are not
saving properly. I have tried 'save as' 2003, tried saving as a macro
workbook, and have tried saving anyway and continuing. But they never save
correctly. If I could open them in 2003, I think it would work. I have
2007
installed and have a disk for 2003, but I am afraid to install 2003 incase
it
messes up the registry or corrupts any current files I have.

Thank you for any help you can offer.