I installed and tried the Office 2007 Professional Trail Version, and worked
with it about a month.  I made sure that every file I created, however, was
saved as a ".... 97-2003" version.  Since my trial was about to expire, and I
was starting to have some problems with it, I uninstalled the 2007 trial
version and kept my Office 2003 version.  Problem now is that I'm having
trouble with several PowerPoint files that I created while the 2007 version
was installed, even though I saved the as the 97-2003 versions.  How can I
convert these files back to Office 2003 versions?  I can open and save them,
but I'm having some serious compatibility issues.  I did download and install
the conversion program.

THANKS!