I am sure this has been discussed before...
But for those looking to just DIM the DRL's I found it in Byte 24.
I did have my DRL's turned off, but decided to turn back on for safety reasons.
I dimmed mine to 55%. Has a nice low radiant glow now. Sorta like the euro driving look.
You can find it in vcds:
09 CENT ELEC
Long Coding Helper
Factory had mine originally set at 92%. Just change that value to whatever you wish.