>>> However I recently discovered an old CD with
>>> these very photos on but it will only play on a PC.
If the CD hasn't been "closed" or "finalised", it can only be read by a CD-rewriter drive. A CD-ROM drive cannot read it.
>>> Unfortunaly Diameter of the pictures are a very
>>> small 160x120 size 5.79 as against the standard
>>> of 2304.1728 (5.79
It sounds as though you may only have "thumbnails" of the photos on the CD and not the original full size pics. Can you open the files directly from the CD and, if so, what size are they?