Its much easier explained in person. Its a lot to type. I will give you the readers digest version.
Have decent gloves. Something like Mechanix gloves. You need decent dexterity, but you will need to be able to work with a hot headlight.
Also have crappy towels/rags. The gasket material is crappy and sticks (PERMANENTLY) all over stuff.
Remove bumper.
Remove headlights.
Strip headlight down of bulbs, wiring harness, and brackets.
Now remove (I think) the 5 screws holding the two parts together.
One at a time bake at (175 I think) for 15 mins.
With gloves on, and an extra set of hands/screw driver. Start working the lens from back.
Carefully pry back the clips, and work it apart.
DO NOT TRY TO FORCE IT!!!!
If its not coming apart, and it starts to cool the gasket material will start to harden.
toss it back in the oven for another 10 mins.
once apart, remove reflector. (this will leave a chrome stop where the reflector was)
Leave it as is, or paint it and put it back.
NOTE: never touch the inside of the lens. It has been treated to my understanding to help prevent fogging.
One at a time add a bit more (not too much) black gasket maker silicone to the seem.
Now try and push the lens back together with the back as much as you can.
Back in the oven for 15 mins.
With gloves pull it and push it back together, making sure to get the clips to grab.
This is where not having too much extra black silicone is good. Any extra will end up all over stuff, and inside the light.
Go put your car back together.
Have fun it took me, with some help about 4-5 hours. You'll have to wait for paint drying too don't forget.