Grub2: Adding entries for a Quad-Boot From Grub2 menu problem?

The installed version of Ubuntu (GNOME maybe?) I'm running is 15.04 Each operating system works fine I can boot from the grub2 into the windows loader from which i can boot 7 or into the xp loader from which i can boot XP or MS-DOS.

My goal is to be able to skip all the extra boot loader steps and be able to semi directly or directly boot into each operating system from the Grub2 interface. I'm having some very preliminary trouble such as editing the the grub2 menu via the grub.d file and using the os-prober command both of which i have not done successfully yet, hopefully we can change that.

First of all what additional information can I add that would be helpful?
How can I accurately identify which partition belongs to which OS? (I think i know based off the order i installed them being DOS -> XP -> 7 -> Ubuntu but how can i confirm)

The boot to MS-DOS thing instead of just doing that in a virtual box is a preference of my teachers. I'm incredibly interested in Ubuntu (or even just Linux) and i wan't to figure out how to make these things work for me so that i can gain a better understanding of the entire OS as a whole. So can anyone help me? :D

I ran these lines of code in the terminal and the output is in the paste bin:

uname -a
lsb_release -crid
sudo update-grub
sudo fdisk -l
Output for the above in here: http://pastebin.ubuntu.com/10856006/

Output for the below are here: http://pastebin.ubuntu.com/10856021/
sudo apt-get install boot-info-script
sudo bootinfoscript --stdout

Thank you,

KSousa