You can't use a cr2 file to make a template, just export the cr2 as an obj (selecting all the parts of the cr2), load the obj in the uvmapper and save the template.
More easy:
Use a text editor, open the cr2 file, serch for "obj" and you'll find the obj file who refers to the cr2, find it, load it in the uvmapper and obtain the template.
More dirty:
The uvmapper saves a low resolution template, but the preview is in high resolution, so a little screen capture utility and you could save high resolution templates