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Try installing the regular version on a flash drive and putting the disk image there as well. Install Daemon Tools either on your main computer or on the flash drive. That should work. I doubt that Heroes 3 requires registry entries.
If you want to play on a tablet/phone instead of your computer, the comment above is correct. If the tablet runs Windows, you can definitely play. If it's an Android device, there's vcma (although it's not a full-fledged Heroes 3 due to technical limitations, but it's very close).
If you want to play on a tablet/phone instead of your computer, the comment above is correct. If the tablet runs Windows, you can definitely play. If it's an Android device, there's vcma (although it's not a full-fledged Heroes 3 due to technical limitations, but it's very close).