Mytherus had a question about using the Fallout Ruleset in FGU in the Bug Report thread.
Here are the two resources I started with. After that, it was all experimentation. Hope it helps.
FG Academy's video with SuperTeddy:
https://www.youtube.com/watch?v=UBcP...bMvGzCRg81-nLg
FGU Fallout ruleset Wiki:
https://fantasygroundsunity.atlassia...t+2d20+Ruleset