Sorry guys. I gave you the wrong software info.
Once again I am stumped. I have mac os x 10.6.8 and have ms office for mac 2007 installed. In the excel spread sheets I created a workbook and didn't save it as 'read-only'. I don't know how to do that.
However, when I opened the spreadsheet it says 'read-only' and won't let me add/change anything. How do I do this? How can I change the preference to automatically save as normal (can add/change info in future)?