what he is trying to refer to is getting the intuition liners molded, depends on the shop, and weather you get the boots from that shop. The shop I work at won't charge you, if you got the boots/liners (they are available separately) from us. otherwise it is shop labor.
and keep in mind that molding the liners can only do so much, If your foot is wider then the boot (which is pretty common) then its still gonna hurt, until you get shell work done, which is at shop labor. Also keep in mind you can not stretch the instep of that boot, so if you have a high instep your not going to be able to easily make the boot work.