(adsbygoogle = window.adsbygoogle || []).push({}); So I was going to mod some gamerscore for my friend today.And before I could enter information to recover it there was a messege on the screen.It said that any achievements earned offline since your last login will be removed.Is there any way to overcome this?

Mod the gamerscore. Then put the profile back on the xbox, go online so the achievements save then tell him to recover.