@AnnLee87 To use it in cooking, simply hover your cursor over some of the usual recipes containing meat and some will now list 'faux meat cube' as ingredient. There are no new recipes specifically based on faux meat as such, to my knowledge.
Also, I can put mine in the fridge. The faux meat ones, at least. I get the impression there is a "regular" meat wall to harvest regular 'meat cube' from? Maybe those cubes are bugged and cannot be refridgerated?
You can disable NPC voting from Settings. And you use 'testingcheats on', then shift+right-click on the mailbox to instantly repeal current N.A.Ps. No need to disable the entire pack :)