I used a USB flash drive to install a PC Fanatic version of the PE system. I accidentally discovered that if I delete the content of the AUTOEXEC.BAT file, which was originally GRUB, and then save it, it will automatically enter DOS when booted. If I want to enter the PE system, I just need to type GRUB at the command prompt and press Enter, and then I can enter the PE system. Hehe ~~~~~~~~~~~~~~~~~
