One of the main reasons I upgraded to Poser 4 from Poser 3 when 4 first came out was because of its ability to operate on any drive, since then I have copied and moved Poser all over including a portable harddrive that I got(usb connect... wonderful)and I keep a copy of Poser on it with all of its 3.5gb. When I upgraded my computer and decided to format and start from scratch I reinstalled Poser and have just put in the models I use all the time.I reached 2.1gb quickly and decided to put it on my 2nd harddrive I just made a folder called Programs and drop and dragged metacreations/poser4 file into that. No problems the only thing I had to change was the path in my start/programs button. Anything I have purchased from Daz or even the freebies all find the right path. Poser is definatly one of the easiest programs to move around. Marge