Just a hint on something I found.
If you already have any FM3 DLC installed on your Xbox , via the marketplace or code, make absolutely certain to remove them (DELETE) them from your 360's HD BEFORE installing the DLC from the bonus disk. I inadvertantly installed one item 2x, it appeared as the same memory block twice and about a week later, XBL had shut down my 360. It shows up as modding to them when 2 of the same memory block appears on the same 360 HD. I had to exchange the entire 360 unit to go online again.
GOTO XBOX360 Dashboard, last blade on right, Memory, Games, Forza Motorsport 2, scroll down until you see your DLC content (it appears red icon where all other memory appears gray), and DELETE ALL the RED blocks to be certain of proper installation of the bonus discs content.
Yes, all four of the LCE cars are there on the bonus disc. ![Smile [:)]](/emoticons/emotion-1.gif)