Still stuck. As a I result, I cancelled the installer and instead copied the remaining .gpk files in disk 2's pack folder to my pc. And it works and I patched it with the 1.02 patcher, and now I'm still experimenting if there will be bugs and crashes.
Daemon Tools Lite has been associated with malware/spyware for years now. I recommend WinCDEmu; it's open source and is very easy to use. Just right-click your ISO, there's an option to mount, choose what disk letter you want, and boom. You can unmount or change disc image the same way as well.