Two questions:

1. Rejetting the Carbs...what does that mean and why would someone do it?

2. Removing the AI...what does that mean and why would someone do it?

Sorry for the newb questions- but as I am continuing to look online- a lot of people said these are two mods they have made and I was just wondering what they entail?!?! Thanks in advance for answerin the newbs questions!!!!