As i found often useful information here, iam happy to help others.
I uploded my win pe image i pxeboot for flashing my rigs.
https://www.file-upload.net/download-13000608/pxeroot.rar.htmlyou can pxeboot it using ipxe. this is my ipxe function for it.
# Windows PE - for flashing
:wind
kernel http://${srv_}:88/win/wimboot
initrd http://${srv_}:88/win/BCD BCD
initrd http://${srv_}:88/win/boot.sdi boot.sdi
initrd http://${srv_}:88/win/boot.wim boot.wim
boot ||
#
google for setting up or using ipxe environment. maybe pxelinux can boot that one too.
keep in mind, that this image boots with firewall disabled and passwordless vnc server running.
this is for local net/vpn.