How Change Prestige Cooker Valve If I Change My Gamertag On Xbox360 Will It Reset My Call Of Duty 4 Online As Im On Level 47 Prestige 2 Time?

If i change my gamertag on xbox360 will it reset my call of duty 4 online as im on level 47 prestige 2 time? - how change prestige cooker valve

Round and to keep all my stats in the rankings and challenges