Thanks in advance. I setup Lion on a separate partition. I love it. I linked my new home directory to my Snow Leopard one; however, several Apple applications won't run. iPhoto, aperture, iMovie, Numbers, etc. All of them give the same error about wrong OS X version and show that they are looking in Lion's Library for frameworks and such instead of accessing the libraries from Snow Leopard. I originally used the directions for setting up the separate Lion partition and linking the home directories from here: http://www.tech-recipes.com/rx/11755/install-os-x-lion-to-separate-partition/ I must be doing something wrong, because I am sure many of you installed using a similar technique, but you guys are all successful in running those applications. Thanks!