Converting from one cart to CS Cart

I currently have several clients using another kind of cart. I will be converting them over to cs cart. My question is if I use the import/export feature within cs cart will I also have to manually set up the categories, or once I include them in the import will that set them up?

What cart are they transferring from?

ClickCart Pro. I Have a total of 6 carts I can convert to CS Cart so I am hoping this process will not be a difficult one.