I was just planning to buy tools and do this myself but then I changed my mind and went to an independent mechanic. This was a bad decision
He even couldn't take out the bolts/screws from the Throttle Housing and then tried to remove one of the flange bolts/screws from the intake boot. I then said "it's OK buddy" and leave the shop.
Now I'm planing to do this myself, any suggestions or DIY's how to take out the bolts/screws without strip off any of them?