The Euro 2 tune is more like a different stock file, so as long as the Shark is being installed after the Euro2 tune I don't see why you couldn't load it, technically the Euro2 tune is just another stock tune so you should be able to flash with Shark, etc
Just my thinking. I will say the lower gears are MUCH less jerky since the Shark, much smoother throttle and power delivery in the lower gears and rpm's. I can only imagine someday combining the Shark with the Vanos rebuild
