First you need to install Windows 7, and safeboot / Mcafee endpoint protection.

Then you need to take a backup of the MBR, this is done with a Ubuntu live cd, run this commands:

dd if=/dev/sda of=/path/safeboot.mbr bs=512 count=1

Put it on a USB flash drive or something else, that you can access after the installation.

After you have make a backup of the MBR, just install Ubuntu the normally way, after you have make changes to grub2 config files.

cp /path/safeboot.mbr /boot/
nano /etc/grub.d/40_custom

At the buttom of this files you need to insert this:

menuentry "Windows 7" {
set root='hd0,msdos1'
chainloader (hd0,msdos5)/boot/safeboot.mbr
boot
}

Where set root=’hd0,msdos1′ is becuase my windows 7 root partition is locate on disk 0, and msdos partition 1, and chainloader (hd0,msdos5)/boot/safeboot.mbr is because my ubuntu partition is located on disk 0 and msdos partition 5.