As Bob said, you don't need to install your previous version of Office.
Start with Office 2003 and you will be prompted to insert your Office 97
CD in the drive. At that stage, insert the CD you have for Office 97
and when it is "certified", remove it and reinsert your Office 2003 CDs
and continue from there. You will get instructions through out the
process on the screen.
Hope this helps.
Hope this helps.