grub2-filemanager

Preview

Type	i386-pc	i386-efi	x86_64-efi
WinPE ISO	✔️	✔️	✔️
Linux ISO	✔️	✔️	✔️
Android ISO	✔️	✔️	✔️
BSD ISO	✔️	❌	❌
IMG (Disk Image)	✔️	✔️	✔️
VHD	✔️	✔️	✔️
WinPE WIM	✔️	✔️	✔️
NT5 WinPE	✔️	❌	❌
Linux/Multiboot Kernel	✔️	✔️	✔️
EFI Application	❌	✔️	✔️

git clone https://github.com/a1ive/grub2-filemanager.git
cd grub2-filemanager
./update_grub2.sh
./build.sh

DO NOT boot grubfm.iso with memdisk!

map --mem /grubfm.iso (0xff)
map --hook
chainloader (0xff)

linux /loadfm  
initrd /grubfm.iso

chainloader /grubfmx64.efi

loader /grubfmx64.efi

efi /grubfmx64.efi