Tension Software (http://pomola.com) has updated DMG Master software to create standard Disk Image Archive recognized by any Mac, to version 2.2.2. The upgrade fixes a bug related to adding files to the archive.
DMG Master costs US$20, though version 2.2.2 is a free update for registered users of version 2.0. It’s Universal Binary, so runs natively on both PowerPC and Intel Macs. DMG Master requires Mac OS X 10.4 or later.