Vinyl Window Decal - Grandkids

Today I played with the idea of making vinyl window decals. I used the Car Decals Cartridge on my Gypsy to make three kids holding hands for my aunt. The design came out great. However, transferring the design from the vinyl with adhesive backing to the window was not so easy. I am still looking for a good way to do this. It gave trouble because the pieces of the people were not connected to the people. I made another one for her of the I (heart) my Grandkids and am thinking of an easier way to transfer this then to pick each piece at a time. I know that there is contact paper for sale, that I might be looking into. I will take pictures of how the decal came out on the window next time I see her in the light.