very easy..
1-remove your bumper
2- remove the light
3- pre-heat oven at 325 celcius for 10-15 minutes..
4- turn off the oven
5- place headlight on carboard so it won't melt against the hot metal grill of the oven
6- let it sit in the oven for 3-5 minutes..
7- take out ( becareful it's hot)
8- try to pry apart from the seams ( using a butter knife to get the wedge started helps)
9- re-heat if required..
10- mask all area you do NOT wish to be painted,
11- paint and let dry ( use high heat resistant paint)
12- reassemble using the reverse way.
repeat for 2nd headlight..
I opened my cefiro lights to retro fit a projcetor in it.. getting the lights open is easy..
mounting the projector and making sure it's straight is harder..
if I was in mtl, I'd help with your project J-J-J
good luck