Tateious

so I downloaded it and put it in my RDR2 folder and presses f2 but the menu didn't show up any idea how to fix this?

where do you save the Ist file to?

For some reason I cannot spawn a horse or swap my model on 04 I can only use the original ped models that are already in the Ist file I changed it and saved it but it still doesn't work do you have a solution?