follow the guide. do what DiabloGTS and Rob said.
i didnt remove my front bumper to take off my headlights. i also washed my headlights with soapy water and let them dry under the sun.
be sure to use Automotive or Household Goop to reseal both headlights because it wont collect dirt & dust.
also...use a heardryer to let the glue dry faster.
i needed a whole day to finish both headlights.