Please forgive me if this has already been mentioned, but I couldn't find it in a search.
One of the minor things that annoyed me about the South East Toyota Distributors (Auer) dual fog/DRL kit was that there's an extra DRL switch that has to be installed on the dash. Well, at least it's extra if you have the automatic headlamp feature with the bottom setting of "DRL Off." Anyhow, I installed mine yesterday, and modified things a little, so that the DRL's behave mostly like factory ones (no ebrake integration, but otherwise the same), turning off if the stalk switch is set to "DRL Off" and on at other times.
From some other posts, I figured out that the factory stalk switch supplies ground to the white wire in it's connector any time the switch is set to anything other than "DRL Off" position. Using this ground, I placed a second relay in place of the supplied DRL switch, to control the relay that comes with the kit. I then bent pin 2 on the under hood factory DRL relay, to defeat the OEM DRLs.
Hopefully the modified block diagram from the kit explains this better than I probably have in this post.
My installation is the one named "Dual DRL Diagram, as installed" and for reference, the diagram that came with the kit showing the switch is labeled "Block Diagram"