It seems I may have hit a wall here... I posted on Audi-Sport.net because they had a very long thread with a lot of active users on VCDS mods (http://www.audi-sport.net/xf/threads/8v-vcds-mods.206515/page-73), and someone who took a look @ the wiring diagram confirmed that coding doesn't seem to be the answer here unfortunately..
"Don't really have the time to dig in to this but with a fast look it would seem that your "side lights" are hardwired to your licence plate lights, left side via BCM pin 59 of connector T73a. If this is indeed the case you will need to remove the splicing or to open the headlight cluster and disconnect the bulbs." - Paraphrased for an edit he came back with.
Bummer. Sounds like my speculation in post #53 is correct (M33/34 spliced to plate lights) .. but it may not flag codes if you pull the bulbs.