I do large panoramics (up to 8 gigs with up to 100 interior photographs). With CS4 and Photomerge interactive I was often able to do good images. Automatic would usually not work. There were usually misalignments. Now with CS5 Adobe took away the interactive function but now have a plug in Ul that only works in 32 bit. So there was really no good reason to get CS5 Photoshop when in Photomerge interactive I cannot use 64 bit and access all the power inherent in it. What is the point of only having automatic features for Photomerge? I hope they add a Ul plug-in soon BUT in 64 bit.