Modern Warfare 2 Retail DLC package question

Does the retail DLC thing at BB and GS have a DVD with the DLC on it? Or just a code? If it has a DVD does it require a code also?

Thanks for any info!

[Copy and pasted from Best Buy Customer Review]

save time and travel download it faster and easier this is DLC stuff
there is no DVD you get the serial numbers only and you download it to the game throught steam there is NO DVD-it says DVD software but its a fraud because there is no disk the case does not say DLC either so if your system dies you got to download it again if you can
So save the time and just download it-take your chances.............


What's great about it: nice maps-installs easy
What's not so great: its DLC (Down Loadable Content)

Ok thanks for the info!