i just bought my first psp 2 days ago, it has the K letter on the barcode so i believe it will be 2.71. I havent opened it yet. Now for me to upgrade to 2.80 and then downgrade to 1.50, is there anyway for me to ensure I dont brick the psp? any tips??? (after that i also want to update to CFW). I want to avoid all errors and such since I just read this on another thread, I dont want that to happen to mine... obviously lol. i heard a tip would be to have the a/c adapter in it to make sure the battery doesnt die or something? edit: and where can i get a good downgrader guide? the stickies at the top? which guide?