chopobo, you don't need to remove the kickplate or go near the ecu on the passengers side. here is a copy and paste from the skylines faq:
"Just up above the fuse panel inside the car is the diagnostics connector
Turn ignition on, short the two terminals for 2 seconds then remove
The ECU will then be in diag mode.
Shorting two of the pins for two seconds puts the ECU into diag mode, when it is put back out of diag mode it also re-sets the ECU, Dak has wired a switch up to this connector which makes it a lot easier.
Here is a picture of the R32 / R33 diagnostic connector. The pins to bridge are marked X
|O|OO|OO|OO|
|X|XO|OO|OO|
R33 Connector:
You can see the connector if you take the cover off the fuse box, the connector is mounted on a small bracket pointing down"
I just use a paper clip to reset it. Personally i don't notice any difference at all after a reset. Do a search on the forums, theres been a few threads on it.