Older Photoshop version, unable to open Galaxy Watch mockup files

I am wanting to merge my watch face designs onto a Samsung Galaxy Watch mockup image.

I have an older version of Photoshop (CS2). Apparently, it is too old to even open the Galaxy Watch mockup PDS files I’ve found on the Samsung developer website. Can anyone suggest alternatives to add my images to a mockup image? I’ve tried GIMP and Pixlr = no luck.


Older Photoshop does not support smart objects. Samsung Galaxy Watch mockup PSD files work based on smart objects.