Installation Program Creation Using InstallShield x Express

This week, we need to install an installation package for a project created in the previous period. The project is in the C/S structure and the client uses the "installation project" that comes with vs2003, it also meets the requirements-you can change the server address pointed to by the client during installation.
The server is troublesome, because there is a large amount of data, which is about 60 GB. So much data needs to be installed on the customer's computer. Originally, it was intended to sell hard disks directly, but the marketing department staff were afraid of increasing the price and the users were too expensive. Therefore, they planned to use DVDs.

DVD is used as the carrier, which is usually around GB on the market. So it takes about 13 DVDs to install the data. I heard that InstallShield has the automatic partitioning function, so I went online to get down a 10.5 Express version.
After everything is done, first published as a CD-ROM for testing, build, run the installationProgram, Error. After a virtual optical drive is created, first attach the first ISO file to the virtual optical drive. Everything goes smoothly. A message is displayed, indicating that the second ISO file is inserted. However, no matter how you click "OK ", the prompt "insert disc 2" is always displayed, so there is no way to do this. Is the sequence of disk numbers not specified? Open the help document of InstallShield for half a day and find the relevant diskid field, but I still don't know how to determine the sequence of the disc. I don't know which of the top guys knows. Please tell me. Thank you!