Callout Configuration

I think it would be really cool to have maybe a config file for callouts where you would have all the callouts you have on your server in the file and you would be able to change the probability of each callout individually instead of the callout developer setting the probability. I also think that each callout should have a separate file instead of packs having all their callouts in one file so that you can add/remove each callout to your preference.