As developers, we tell you you don’t need to move or copy any of these files. So I don’t know what you did, but that’s not the part that got things working.
The only file that needs manual intervention currently is the EFI bootloader because we have not yet integrated that into the installation process. You can find it in /system/data/platform_loaders/haiku_loader.efi and it needs to be copied to the EFI system partition.