IMGBURN is best for burning activate.iso like faizy said, you should try this tutorial.
1.
http://www.imgburn.com/ (Leave the default settings untouched or restore to factory defaults).
2. Right-click Activate.iso and then select "Burn using ImgBurn".
3. Click the Write button at the bottom left.
4. Proceed/continue with burning the image onto an 8.5GB DVD+R DL.
5. Sway from the norm and burn only on 1 layer.
6. When the disc has been written and then ready to finalize, let it finalize throughout the entire process. This is going to take a while...
7. Put the burnt disc into 360, press A on controller to Play DVD. Eject disc and then put in a Wave 4 game until iXtreme 1.7 releases, or a non-stealthed game. Press A again to launch game.
Note: If you get stuck at 99% during finalization, it is normal. Your burner is burning data onto every single empty sector of your DVD+R DL disc. It will take the same amount of time as burning a 7.29GB image.
Dear TheGoldenTouch,
sorry for using ur nick but i dnt knw ur name....infact i used that boot disk the same way u have writeen above but it still doesnt work,am yearning to play COD Modern warfare 2 and its not working.......plz helppppppppppp