sanboot problems.

[Nostradamus]

For the wimboot method:
Mount your ISO file (Virtual Disk or similar). You will find the wim file in the "sources" directory. Your file size will be little below 600MB. Copy the files including fonts (for error messages) and bootmgr to your Web- or TFTP Server.
Config file for HTTP download.

Code:

    #!ipxe
    dhcp net0 && echo IP address: ${net0/ip} ; echo Subnet mask:${net0/netmask}
    kernel http://NNN.XXX.YYY.ZZZ/wimboot/wimboot
    initrd http://NNN.XXX.YYY.ZZZ/wimboot/win8_1/bootmgr bootmgr
    initrd http://NNN.XXX.YYY.ZZZ/wimboot/Boot/bcd bcd
    initrd http://NNN.XXX.YYY.ZZZ/wimboot/Boot/fonts/segmono_boot.ttf segmono_boot.ttf
    initrd http://NNN.XXX.YYY.ZZZ/wimboot/Boot/fonts/segoe_slboot.ttf segoe_slboot.ttf
    initrd http://NNN.XXX.YYY.ZZZ/wimboot/Boot/fonts/segoen_slboot.ttf segoen_slboot.ttf
    initrd http://NNN.XXX.YYY.ZZZ/wimboot/Boot/fonts/wgl4_boot.ttf wgl4_boot.ttf
    initrd http://NNN.XXX.YYY.ZZZ/wimboot/Boot/boot.sdi boot.sdi
    initrd http://NNN.XXX.YYY.ZZZ/wimboot/win7pe_x86/sources/Boot.wim Boot.wim
    boot

I'd be very interested in your results as I could not get these large WIM files to work. Take a look here: wimboot Custom WIMs
Unfortunately nobody ever replied to my request here or in the iPXE devel mailing list.
I'm very interested if large WIM files work for anybody.
The only way I could get these large files to work was the memdisk method.
Config file for HTTP download:

Code:

#!ipxe
       set download-url http://NNN.XXX.YYY.ZZZ
       dhcp net0 && echo IP address: ${net0/ip} ; echo Subnet mask:${net0/netmask}
       initrd ${download-url}/win7pe/win7pe_x86.iso
       chain ${download-url}/syslinux/memdisk iso raw

Of course you need to correct the file locations...