First of all, great choice of bike! The '06 Midnight Tour Deluxe is the sexiest.
So, if it wasn't clear, what is done is that the stock turn signals end up hanging below the passing lamps on a new curved bar. (Before/After photos below)
You buy the mounting bar (P/N STR-1D635-40-00) and then choose either sealed beam (STR-4NK35-10-00) or halogen (STR-4NK35-10-01) lamps. I bought the halogen and I am very happy.
I was not so happy about the installation by the dealer, which turned the lamps off when I turned on highbeams. Lots of advice here on this site about how to do it properly using a relay. I'd snoop around until I understand. (Took me a while!)
If I might suggest projects for you, I would first install an auxiliary fuse box under the seat. Then you can branch out to the front and back, and have a solid place to grab energy from.
Good luck, and have fun!
Dave
