The most convenient way to download an installation DVD for Fedora 11 to your hard drive is using bittorrent clients for Linux.
Ripping a Single Audio Stream from a File or DVD
Valid for Fedora 10.
SD, MMC Cards not Working or Work Too Slow
The solution works for SD card:
Burning an ISO Image to CD a or DVD Disk
From a command line, it looks quite simple
Copying Directly from One CD to Another
This is quite simple:
Copying a CD to a File on a Filesystem
A couple of methods for copying a CD to a file: