Drowning gets you good items but walking the whole big towns searching for rares is tedious.
Enter Round'em Up, which lines them nicely for you to see at once.
Changes are made only to towns where drowning is possible.
Good synergy with Marson's Character Recycler which lets you restart by pressing Ctrl-Alt-Shift-L instead of suiciding.

It works by overloading the town file with changed npc generation boundaries.

I'm a programming noob (or even less), so go easy on me. There should be no errors though, only changes are 4 number values for each town.

PS. I can't help but feel there was a better way of doing this. Sorry this addon is so heavy.