hey just saw your comments on my pictures. first off, here is link to my LED shift gate thread:
https://acurazine.com/forums/2g-tl-photograph-gallery-99/custom-led-shift-gate-762908/
as far as getting to the actual shift plate thing, there are threads on how to do that already. i just used a very thin flathead screwdriver and pried everything off. you can wrap the flathead in tape so it does less damage.
second, here is a link to a bulb application guide:
https://acurazine.com/forums/2g-tl-1999-2003-98/bulb-application-614883/
the bulbs that you commented on the are the dome light-DE3175 and the door courtesy lights-168/194. i got a friend to make me the LEDs from scratch but you can go to pep boys and find them there, although they are on the expensive side. or when you figure out which bulbs you need you could go on ebay, v-leds.com, or superbrightleds.com.
third, you asked about bumper removal to get to the resonator. i didnt remove my bumper. although you totally could and it would make it easier to remove it. but i dont know how. i followed the first part of this CAI DIY:
http://wizardsworks.org/chod/acura/cai/printme.html
it took me a while cus i didnt have the proper tools but overall its very easy to do.
hope this helps!