Heya lplp1 :) It totally depends on where you purchased the character and from whom :) In the case of the two specific ones you have named, Posette and Vicki, yes, you may make alterations to the character, such as changes to the body via morph targets, textures sets, all that, then you may of course give those away, or sell them. It IS traditional in this site to give an abundance of credit to everyone you can think of... just imagine you are at the Academy Awards and you are thanking everyone from God to your Mother, and you will do well ;p So yes, plan to accredit Daz3d for Vicki, Traveller for Morphs, Kozaburo for Hair... and on and on and on... even just inspirational credit goes onto my credit list... one can never give too much credit, now can one? ;p Also, this is the legal way to do things ;p Respecting Copyright is merely good manners and gratitude sometimes.