I've been eating a lot of fast food stuff so it can't be good but: Friday=pizza, saturday=cheeseburger, sunday=pizza, monday= sushi, ice cream and boneless, and today I had a cheeseburger, soda and a dq brownie blizzard.
I regret nothing!
Why would you need a PC to do so? You can do it from the settings menu on the vita.
Also, question. Why are you formatting if you're just going to move the stuff back anyway?
Don't really understand the first part but don't worry about it cooking your vita. I've used it a lot on Minecraft and previously Borderlands 2. (Just pulled the bumpers and set them all to max).
INB4 Shinobu appears and tells you oclockvita>BetterAmphetamin