The customer wants a dialog to appear informing the user to do a task (closing Office). The customer also wants to have a timeout period associated with this dialog to close and resume installing if the user did not click Continue within five minutes. Can this be done within Installshield without scripting my own dialog?
I don't think there's anything built in. For Basic MSI, the closest thing I'm aware of is using a modal dialog. The MSI help topic 'Authoring a Conditional "Please Wait . . ." Message Box' has an example, but in any case your custom action would need to do the work of deciding when to close the dialog box.