I used the TommyGuns weapons mod before, and the samuraiSword was used from the TommyGuns folder. Adding tommyguns_items to the module will look it up in that folder. The prefix is used is the same as you would use PizzaZombies prefix for example "PizzaZombies.MysteryBox" to use the mystery box, or Base.Shotgun.
and line #36 is table.insert(SuburbsDistributions["post"]["all"].items, "PizzaZombies.Perkmoney"); in my luafile. I'm clueless about why there would be an error in this line.. Did it occur at the post office? Did a few tests but never seen that error come up, neither did I find any of the items I used Hydrocraft.HCLoading.lua as an example, but apparently there is some trick to get this working. Weird that the print doesn't show up.