The guidelines do not represent a change the church's overall policy on burial and cremation, but rather underline "the doctrinal and pastoral reasons for the preference of the burial of the remains of the faithful and to set out norms pertaining to the conservation of ashes in the case of cremation" [...]
The newly articulated ash norms include not storing human cremains in the home and refraining from scattering ashes "in the air, on land, at sea or in some other way ... in order that every appearance of pantheism, naturalism or nihilism be avoided." [...]
"The Church raises no doctrinal objections to this practice, since cremation of the deceased's body does not affect his or her soul," the guidelines continue, "nor does it prevent God, in his omnipotence, from raising up the deceased body to new life."
So, that last bit is good to know!