code:
title Windows XP with SP3 x86
root (hd0,0)
map --mem /WINSETUP/XPpSP3.ISO (0xff)
map (hd0) (hd1)
map (hd1) (hd0)
map --hook
root (0xff)
chainloader /I386/SETUPLDR.BINtitle Windows 7 with SP1 x86-x64
map --unmap=0:0xff
map --unhook
root (hd0,0)
chainloader /bootmgr