Migrating Debian Wheezy to LMDE

My “mediacenter”, a small x86 machine plugged to the living-room TV was a diskless (PXE/NFS root) Debian Wheezy until the past week end. After having tried Linux Mint on a laptop of mine and being impressed by its integration quality, I decided to migrate my mediacenter to LMDE. I did not reinstalled the system, mainly because Mint does not support debootstrap, instead I followed a couple of HOWTOs I found on their forums: this one and this one.