I had the same problem for the past month. I bought the 360 just to play NCAA 07 had it less than a month. I returned the game to Game Stop 3 times and got the same results. I finally returned and exchange the my 360 to best buy and got another. No problem since. I believe I figured out he problem. My original 360 had a samsung/toshiba DVD drive. My new 360 has the original Hitichi Drive. By random chance I got a 360 w/ the older Hitichi Drive from BestBuy.
If you look a the difference on this website. http://en.wikipedia.org/wiki/Xbox_360_Technical_Problems it is noted that the "newer model samsung/toshbia drives have a harder time reading burnt DVD+R DL.
"With the third production run of the Xbox 360, the original Hitachi-LG DVD drive (model GDR-3120L) was replaced with a slightly quieter Toshiba/Samsung DVD drive (model TS-H943). The Hitachi-LG DVD drive model has been known to read burnt DVD+R DL discs better than the newer Toshiba/Samsung drives, and is much less picky about DVD Burner/Media compatibility. Phillips drives were only used in pre-release development Xbox 360s.[4"
I believe it is note a coding problem but rather a disk "quaility" manufacturing problem by EA. The Toshiba/Samsung are having a harder time trying to read the disks. I noticed w/ the Samsung that my 360 would be spinning faster (noise) before I got the DDE. W/ the Hitichi the spinning noise is even throught out the game.The Samsung is treating the game like a DVD+R DL disc and is having a hard time reading it and freezing.
My 2 cents
Hope it helps.
-J