This may be less of an issue now that we don't have the split CD set, but I would like it if rel-eng could produce a file into the master mirror tree for "groups" of files that should be a single consistent download set, such as a DVD and the checksum file, or the set of files that are together inside a single torrent. MirrorManager is growing the idea of a "file group", a single requestable entity that will return a metalink listing each of the files in the file group. The intent was to use it for the multi-CD download sets, but it's just as valuable for the DVD and checksum file, or other similar groups. But it needs to be a file (say, .fileset or something), in a directory that MM can find and use to build the FileGroups.