There are some links in post #5 you may find useful
Thank you! The 'disable auto arrange' option is very useful. The only thing I'm concerned about is how permanent it is, i.e. where is the information stored? If I remove the temp files, will the sorting data be gone? If this information is stored in a specific file it would be useful to make a backup of it so I can easily restore.
I might go with this solution but I haven't ruled out the alphabetic method. So if anyone knows characters that come after "z", or is sure none exist, please let me know...