Wimboot

LABEL winpe KERNEL wimboot APPEND initrd=bootmgr,boot/bcd,boot/boot.sdi,sources/boot.wim

#!ipxe

Here is a standard legacy BIOS boot script: wimboot

wimboot attempts to "demand-read." It does not strictly require the entire WIM to be downloaded before starting bootmgr . It uses the underlying iPXE stack to fetch data as Windows requests it. However, for reliability, iPXE often attempts to download the whole file first unless specific settings are tweaked or compressed WIM formats are used. LABEL winpe KERNEL wimboot APPEND initrd=bootmgr