Have you tried either to append these commands to /etc/rc.local, or having that script call trackpoint.sh?
Looks like typical init stuff to me. Outside startup, I think it's just to prepend "sudo" to the commands in a script you want to execute with root privileges, at least it seems so to me.

As for decorations - LXDE is lightweight, but I think you have some choices. The first thing to check is to see what Compiz does - if you use that. Think the window headers all went away when I chose "no window decorations" in Compiz setup..