Tuning-Update for the 360 (link at bottom)
Hope this helps some people out.
You will have to resign the file like other saves. It worked for me transferring to a different profile.
I had to move the ncaa file from my usb stick to the xbox hdd through the xbox dashboard, so i could have the tuner without having the usb plugged in all the time. If that makes any sense.
http://www.mediafire.com/?6yesin0e6ssnbgb