I once had an interesting discuss about the Church's view of cremation with my youngest son, then 18. In response to his question as to why it was forbidden at on time, I launched into a detailed history of early Roman practices, the various issues since and finally ended up by telling him that it is now permitted with the caveat you mentioned. He thought about all that for a moment and then said: "Dad, that's pretty stupid thinking. I think if God can make everything out of nothing than putting me back together out of ash isn't a problem." It was probably the best reasoning I've heard about the subject.
Which was followed by this very important information that I neglected to mention.
...also, spreading ones ashes anywhere is forbidden too. I, unfortunately, have a sister in law who was cremated and she "remains" a little bit here and a little bit there. ew.
That is correct! You still have to bury the ashes or put them in a vault. Not to be confused with vaulting them (into space or anywhere else)or wearing them in a locket around your neck. Also, burial at sea is okay, because it is sometimes a necessity. God may well be able to gather your ashes from the four corners of the universe, but please don't make Him have to do that much work. He would need such a giant dustpan.
Speaking of giant dustpans...we just found ours. It has been lost for almost 2 years. We lost it when we were battling the morning glories that grew all over the front of house and down the neighbor's fence and out over the sidewalk. It was so massive that the neighbors on the other side of the house came and helped and when it was all over, the giant dustpan was gone. We looked high and low for it and even St. Anthony could not find it. We assumed it had gotten tossed out with the two enormous cans work of clippings. And the, lo and behold! it turned up buried in a closet over this weekend. We would call it a miracle but it was not instantaneous and unexplained, although we have no explanation.