8. Place the boot cover on the very end of the piston, the end that goes into the cylinder. Make sure you have it on correctly before placing it into the cylinder. I recommend practice placing the boot into the cylinder before connecting the piston onto it.
9. Slide the piston in while holding the top of the boot. The boot will connect to the pistons ring once the piston is pushed half way in.
10. Push the piston all the way in using your hand, making sure it goes in straight.
11. Reinstall caliper in reverse order.
12. Bleed the brake line and you're all done.
Enjoy your new regained stopping power.