Except for the Corel graphics programs that support .cpt files (PaintShop Pro, Photo-Paint etc.), you can also find some other 3rd party programs that should allow you to save your Photo paint images (.cpt) as JPEGs (.jpg, .jpeg) or other common graphics formats, i.e. cpt to jpg conversion for example, which is much more convenient for sharing purposes.
Open CPT file Open JPG fileA multimedia presentation creator for Windows Mobile
A dedicated conversion software