install win7 on iscsi target

[robinsmidsrod]

Installing by doing "exit" and letting the BIOS continue installation from DVD has problems on a lot of machines. It never worked well for myself. The new wimboot method of running WinPE and starting the installation from the ramdisk is much more reliable. You can just as well install from DVD as from a network path (CIFS/SMB). See this howto for details: http://ipxe.org/howto/winpe