I like to sort my sessions by date, since I'm usually interested in the most recently used sessions (and I tend to let them collect). So I added a sort-by-date to the Session Manager.
The attached version of SessMgr.s includes David Deley's string-length changes. See this thread for more information:
http://www.multiedit.com/forums/viewtopic.php?t=1482
I prefer to name my versions of macro files the same as the original. The first thing I do when I install a new version of ME is to create a subdirectory of SRC, called ORIG, and copy all the factory-issue source to that directory. Then I can modify the versions in SRC with impunity, and the standard 'Recompile Macro Source' and 'Rebuild Macro Library' shortcuts will include my versions. If you download and compile this file, please first save your original SessMgr.s to another directory!