Kenny (Trixiem) and myself decided to pick up a set of the JDM EK9 sidemarkers from ICB Motorsport in Temple City.
ICB Motorsport Homepage



We printed out a template and used guidelines from this site:
Template and Tips for Sidemarker cutting
The person on the site mentioned they cut the hole smaller than the template, but we found that the template was an exact fit leaving the notch alone and simply following the lines to cut the holes.

The template we followed:



Here is the placement on the fender, 155 mm from the top of the molding to the bottom of the tape and 140 mm from the edge of the door to the edge of the tape.



We then found the center of the intersection, which is where the exact center of the sidemarker:



We then found the center of the template and lined up the two over each other and taped it down.



A drill was used to make the initial hole, then we used a "Metal Nibbler" from RadioShack ($12.99):



(This thing was awesome, and it cut very precisely, even though it took awhile, probably better than using a dremel.)

Getting started on the fender (EEEEEP!). I look scared in that picture. Poor fender.

"T" is for Tony!!




The final hole:



After cutting the hole, add place some touch up paint on the bare metal to help prevent rust. We also plan to get a rubber ring to create a tight seal around the sidemarker or use plumber's putty to help it.

Kenny wiring up the sidemarkers:



There are two wiring options. USDM (Sidemarker only blinks when turn signal is on) or JDM (Sidemarkers stay on and blink alternately with the signal). Pull back the fender liner and remove the corner/parking light. There will be 3 wires going to the bulb. Tap into the corresponding wires for each blinking style.

USDM:
Tap into green(turn signal) and black(ground) wire.
JDM:
Tap into red(parking light) and green(turn signal) wire.

Sidemarker is in!

Installed sidemarkers on our cars:





Practice fender we had before we started:



Practice fender after a hard day of work:



That's about it folks. Hope this is helpful to you all. Thanks for looking.

nice job! a lil off topic but how much do you want for the 99-00 tails? trade for a comptech icebox intake?