Dude congrats on the flushmounts!! They look sweet. Gregg's makes nice flushmounts and they fit awesome from what I've seen. Haven't been to his site in a while, but he doesn't make them for all makes and models, just a few of the more popular models. Unfortunately I don't have a closeup view of mine and it's two damn cold to uncover the bike in the garage. I'll grab a shot this weekend once it warms up and I'm working in the garage for a bit.
The lights are only two wires, (Ground and Positive), unlike your stock front flashers they are equivalent to a single filament bulb so they are designed to be on all the time or on only when the turn signals are flashing. However, you can set them up to run solid and start to flash when you turn. Actually you can set any single filament bulb to behave like a double filament, but you just have to be a little creative with the wiring. Look for one of two things. You'll either need a third brake flasher module (technically called a CHIMSEL "Center HI Mounted Stop Light") or a relay(s).
Before CHIMSEL lights were standard and required by law, most autoparts stores sold a "Third Brake Flasher Module" to prevent the aftermarker brake lights from flashing when installed on cars that didn't have amber rear turn signals. You can adapt this to bikes by running the parking lights to the brake light input and the LH & RH signals to the RH & LH Inputs. As strange as this sounds, wire the brake light output wire back to both turn signals with a couple of radio shack diodes in line. The diodes will keep the turn signals from flashing simultaneously providing you install it the correct way. Diodes are directional and prevent positive voltage from flowing backwards and feeding into the module. They may have a flasher module that can split the signal without the diodes but you may have to ask around and confuse a bunch of sales people before finding one.
There may also be a straight relay setup that will work. Find a good Radio Shack with a smart rep and they can set you up. Again, you may have to filter through a couple radio shacks before finding the right guy(gal). I believe you'll need a pair of 12 Volt DC Always On Single Pole Single Throw (also referred to as a 12VDC NC SPST) probably like 5 amps, maybe ten, may need to experiment a little. Write Gregg's and he might be able to point you in the right direction, otherwise I can probably draw up a schematic for you.
Also when you switch to LED's you'll need to takeout your stock flasher unit and replace it with a time-dependant flasher rather then a load-dependant. Also available at most auto parts stores. The resistor rating for LED's is lower then the stock 157 bulbs in your OEM's so your flashers will flash super fast when you use the OEM flasher unit. If you keep your rear's stock, the problem won't be too bad. Gregg's solders a resistor in his LED's and that helps, but if you put his LED's in the front and change your rear's to a lower rated bulb, the thing will flash faster then Rossi down the straight-away.