Linux Mint 12 LXDE Revisited: Create Linux Mint 14 Nadia LXDE from Lisa LXDE

I really love the Linux Mint 12 LXDE edition. But, because of some reasons, LXDE ran out of favor and the Mint developers preferred KDE, Cinnamon, Mate and XFCE for the future releases. So, versions 13 (Maya) and 14 (Nadia) never saw an LXDE release. That is where I decided to do an experiment - install the Linux Mint 12 LXDE version and upgrade it to Mint 14. I could have also installed an LXDE