I have noticed that you modified options 067 and 068 in the DHCP server, but the options that have to be modified are 066 (server’s IP) and 067 (pxelinux.0).
[FONT=Calibri][SIZE=2][url]http://www.fogproject.org/wiki/index.php?title=Modifying_existing_DHCP_server_to_work_with_FOG[/url][/SIZE][/FONT]
I am trying a benchmark with virtual machines (Win 2003, Ubuntu 10.04 Desktop + FOG 0.32, Win 7) and it works perfectly.