Running Puppy Linux 9.5 fossapup64 from USB on my acer laptop.

I downloaded fossapup64-9.5.iso checked md5sum, copied it to USB and tried booting but it was not bootable on UEFI machine. Then I copied only following files from the iso at the root of USB: vmlinuz, initrd.gz, puppy_fossapup64_9.5.sfs, zdrv_fossapup64_9.5.sfs, adrv_fossapup64_9.5.sfs and fdrv_fossapup64_9.5.sfs I created EFI/boot folder at the root of USB. Downloaded bootx64.efi and grub.cfg files. Copied bootx64.efi in EFI/boot folder and grub.cfg at the root of USB. I could boot into Puppy Linux 9.5 Desktop from the USB: