I've done a few in my time....it's gotten to the point that I just peel off the backing, have a friend hold one edge while I hold the other.
We then attach each end to the fender arch, gently apply pressure for adhesion.....I check location and height then starting from the middle press for central adhesion and squeegee out towards each fender arch.....peel top sheet off slice at doors and fenders and I'm done....sometimes there is a need to prick small bubbles.
Takes 3 minutes.
BTW...on pic size, most cameras have the manipulation software that comes with the camera. You can adjust brightness, sharpen, fuzz out, and resize.
Most cameras can also be set to take particular sizes before snapping. RTFB....
Either way, before posting, reduce the size in your software to 600x450 or 450x600 depending on the orientation of the shot....save it, then post.
BTW2....Are those the ones I sent ya?