These are the patches that add DVD functionality to the 2.2 kernels. The dvd-cd series are specific DVD addons, while the dvd-ide series contain Andre Hedricks' IDE stuff as well. 2.2.15 is the last kernel that will have the DVD functionality available as an add-on, as of 2.2.16-pre2 it is included in the stock kernel and hence no extra patches are needed. Jens Axboe