Yes , those work and the SB article is a good read for anyone venturing this far .
The more you understand of these flash code systems , the easier they are ..

The led/sw tool is just a cheapo , convienient way to get there and is nothing more that a copy of the built-in led/sw circuit that comes with the car... if they had put a button on the other pins , you would not even need it... but ,they didn't , so we find a way..

Anyway , on the tool, I have made made a few and it is interesting how many different chassis members have put the circuit in.. from 35mm film cans
to Tik-Tak containers ..
Here is a favorite of mine made from a little cheapo flashlight that works well in the sun-light cuz the led is mounted in the lens reflector and nice and bright...

I know .. too much time on my hands ... b/g

http://members.aol.com/ajdalton7/dcp_0077.jpg