Lemme start by saying "great job on your part" in taking some action on your own!
I'll add that I'm sure there are some of these floating around, but people tend to be a little stingy with them

, once a public release of something like this is out you start seeing dozens of people walking the same rails competing for the few Boura that spawn.
It sounds like you already have a good idea of what needs to take place:
Walk a set rail with many waypoints.
Keep Enemy of One active on the char.
At the end of each waypoint look for a Boura.
If found, Consecrate Weapon and attack the Boura
Check for when the Boura is dead.
Find it's corpse, open and loot.
Return to last waypoint and look for any Boura that might have wandered over.
Continue to walk rail.
It seems you have everything you need except the corpse portion. If you look over some of the simple looters here and at EUO I think you'll see what is needed. You'll probably be able to identify some sub routines that are exactly what your looking for.
Maybe "Venosa's Boura Rail Farmer" will be your first contribution to ScriptUO!