Hi again! So please pardon the complete nooby question that I’m going to ask, but I need help, and I thought this way would be best. So im new to zbrush, and have been sculpting mainly cartoon faces (castle crashers and so on) but if run in to some snags and it hindering my use 
im trying to add other things to my sculpts, but when I do the original ether disappears, or goes away that when I move it, it changes proportion. Ive watched all these vids ( http://www.youtube.com/watch?v=UL2Pnrh8-Ok) and I just cant figure it out. Also, I would like to learn the other things he does (like connecting the pieces and all that other stuff :P) any help would be nice, and well appreciated 
nothing yet? I really need the help, so please, can someone at least point me to a video, or a place where I can read up on these things 