Lol, don't feel too bad; it took me a while to figure that one out myself! I love both of the replicators. I get a big kick out of putting huge amounts (thousands) of trees on my landscapes with very little memory requirement. I tried the Terragen 2 preview as well, but the problems you cited, plus the difficulties in navigation and setting the cameras on a local level to showcase a carefully crafted model made me put it on the back burner.