Unless you're experiencing problems, leave it alone. Yes it does do a few nifty things. Traction control isn't one of them - that's your right foot. If you think you have traction issues with a stock turbo, please don't upgrade it. (no offence intended)
That said. 0.9 bar is too much for the stock turbo and 0.6 is not taking advantage of what you have. 0.8 is good. You may need to adjust the boost duty cycle down a little to make sure it hits the right boost.
Probably best not to play with it if you have no idea. Try reading the manual. If that doesn't help take it to a cruise that your local Skyliners are going on and someone there will know what to do.