>Most of my Shortcuts which Installshield created are modifiable -I can change
>the target and the working folder. But one shortcut created by Installshield
>is larger in size (2K instead of the 1K of the others) and not only not
>modifiable but the target and working folder are empty and disabled. Seems
>to be a different type of shortcut.

Sounds like a Windows Installer shortcut. This is the kind of shortcut that allows an application to be self-healing.