How can I install "Reward Point Full Suite" on v1302?

As the shop templates is based on the version zen cart v1302, I need to upgrade the shop version or try a method to install this addon on a older version. As it says only for zencart 1.3.9 and 1.5.x.

If I can not install it on the older version of zencart . How should I upgrade my current custom templates to fit 1.3.9h or 1.5.x?
Is there a "text book" with more details which can teach me to do this upgrade?

Online waiting for help!

I simply cp the 1.3.0.2 custom templates into the 1.3.9h and set it as a default templates. Issue comes that it shows a blank page when I visit the mywebsite.index.php

mywebsite is http://139h.ladyidiy.com/

check your cache folder first for debug logs.
Most of the time template files can be used in newer versions. Just do a file comparison and make the necessary changes