Kodak does not have or make any conversion software.
However, we have found Irfanview, a free image program that will read a PhotoCD or PictureCD file and you can save it as a TIFF or most any file format, to be effective.
There may be others that work but this is readily available and actually quite powerful for freeware.
Note: this does not imply an endorsement from Kodak. We are providing information only.