(adsbygoogle = window.adsbygoogle || []).push({}); I have recently done the 10th prestige hack and regret it and want to reset back to 3rd prestige (i know it is possible as my friend has just done it but he hasn't told me how) please help me!

you do the exact same thing as you did with the 10th prestige hack.. pick your prestige from the list in the sticky on the mw2 front page, load the game save and walaaaa do the same step over again (that you did with the 10th pres hack). You will lose everything though and start off at that prestige, personally i tried the 7th prestige one and lost all titles and emblems and was unable to gain XP or rank anymore i was stuck on 7th prestige!
so make sure you have the backup to switch back to 10th prestige if your not happy with the one you choose.. and as for going back to what you were before the hack i'm not certain you can once you complete it

hope this helps