DMGInternetEnabler is a small tool which enables you to convert standard disk images to internet-enabled ones whithout having to use the Terminal. A description about such disk images can be found at http://developer.apple.com/ue/files/iedi.html.
I oroginally hated Internet Disk Images as well, but the more I thought about it the more I realized it did make sense. Nine times out of ten the disk images dont save HUGE ammounts of space & if you really want to archive your downloads it is a lot easier to burn a CD with the actual uncompressed files rather than having to mount TONS of disk images the next time you want to restore a system or something. Plus if you really DO want to keep your archives, the flag to make them internet enabled images is cleared after the first use so in the future you wont have the hassle.
I can say it would be nice to have a preference set in Disk Copy that would let you disable that feature.
Gawd, I'd like to ket my hands around the skinny neck of the 'Einstein" at Apple who figured that throwing archives away was a way cool idea. "Hey, where's that thing I just downloaded? Oh, it's in the Trash!"