At the moment in order to delete a disk image from the server, you need to remove it in 3 places. The disk image package, the disk image resource and then the disk image file itself fromthe file system. As referenced in this HOWTO:
http://www.symantec.com/business/support/index?page=content&id=HOWTO63316
So in order to remove a disk image you need to do it in 2 different locations in the console, followed by actually deleting the disk image file itself manually from the file server using the package GUID as reference. If you have a number of disk images to delete, this convoluted process can be very time consuming.
It would be extremely useful to be able to delete disk images resources, packages and file system files from within the console with just one option. Perhaps a check box or pop-up that asks to delete all reference to that disk image? Something to allow the deletion of disk images in one step rather than 3, very long and convoluted ones. The ability to select multiple disk images for deletion in the above way would also be very useful.