I too have a Sony CLIE PEG-SJ22/U that I just acquired through craigslist last month and have tried an older version of this software(version 5.41 Build 060417). I have been successful on using it with Palm OS 4 by finding the appropriate themes(the only one I have found so far is a star trek LCARS theme). Would anybody have an idea as to where I could ascertain the appropriate themes for this version of ZLauncher? Anything will be greatly appreciated. I will try to keep tabs on this post.