If you can find the location of the image that is used in the template then you can link to it, but I don't know if you can designate it as the primary picture (which would make it appear as a thumbnail on the profile and also on the tree).
If you hover your mouse over the picture wherever it appears and right-click, you should get a popup menu that has a choice to "save picture". Do that and save it on your computer. then you can upload that picture to the profile. When it is on the profile, you can select it to be the primary picture, which will make it appear as a thumbnail on the profile page and on the first 3 generations of the tree.