Guide to SWAP weapon models

Hi! Im new here.

There is any guide to swap weapon models in 1.9.1. Im trying to give ST.george sword the skin of sir radzig one, but i cant make it working, changed in the tables.xml (pickable_items). But no way.

Appart from that, got the sword by cheating code but the skin changed and its no longer like the tutorial one, doesnt have engraving, etc. Anyone knows how to solve this?

I know there was mods on Nexus that changes Georges or queen sheba to radzig, but they are no longer avaliable.

Thanks!