Hello, to everyone still experiencing the insert dvd error I believe I have found a solution to the problem.
Firstly go to this link and download the application Locale Emulator. Its a local emulator app, nothing dangerous.
Once that is downloaded and installed properly right-click the "start.exe" in the game folder. Choose "Local Emulator > Run in Japanse (admin)"
The game should start up normally and you will get the dvd error once more, however just hit yes and it will continue to the next screen.
On the next screen you will see a blank text field, enter Q6ZL-HRH8-PZJF-Q2RE into the blank field and click on the first option below the text field.
After that the game should be good to go. You will need to run in local emulator every time you want to start up the game however, although this shouldnt be too big of an issue.
Hopefully this works for everyone else as it did for me!