I was watching Phil Schiller's Power of X online QuickTime presentation and saw the demo of the new self-expanding disk images by Ken Bereskin. I searched in Disk Copy how to convert an image but couldn't find it. So I emailed Ken and he answered with this excerpt from a soon to be published technote:
Internet-enabled disk images are identical to regular disk images except they have a special flag set. You create the disk image normally and then set the internet-enabled flag with the following command:Don't forget to check out Ken's Weblog for more OS X tidbits.% hdiutil internet-enable -yes|-no|-query [pathToDMG]"Use -yes to enable the flag, -no to disable the flag, and -query to test whether the dmg file is already internet-enabled.
You can set the internet-enabled flag only for read-only disk images. Read-write disk images cannot be internet-enabled. Older IMG and SMI files also cannot be internet-enabled.
Because Disk Copy clears the internet-enabled flag after it processes a disk image, if you need to test the file before putting it online, you must make a copy of the disk image first and test the copy. You cannot retrieve a processed disk image from the Trash and then place it online, it will no longer be internet-enabled.
Mac OS X Hints
http://hints.macworld.com/article.php?story=2003011506311295