My gut feeling is that not many Lexus owners will do this, themselves but if this post gets enough "hits" I'll pin it so that it can be easily found.
Thanks, Chris for the link and writeup.
Dave
Did it work for you?
It did not for me with the included fob.
I purchased a factory new fob for my model year, 2010 ES350 and was able to program that FOB with the doorman OBD dongle.