|InstallShield Version 6.00.000|
Common errors are:
To diagnose hangs start "PROCESS EXPLORER" and sort by "Startup Time" (adding this column if required). Have a look at the process you started plus any child processes and right click on these and choose the "WindowBring to Front" option. This will hopefully make a dialog visible.
If a file is missing from the image (perhaps you are trying to limit the size of the image) you will probably get a "Setup needs next disk" dialog.
The funny things about an unexplained hang, I've never seen one that didn't go away on a retry or after a reboot!