Greg,
The sequence is:
1 - set o-vi
( You can place this in either the .profile or .kshrc. I'd recommend the .kshrc)
2 - Type the number of characters to get a unique file name
3 - Press ESC then the backslash key
If all goes well it should complete the name of the file for you.
The trick is the characters that are passed need to be unique. If you have three files
called stuff1, stuff2, and stuff3. If you type in stuff and go through the sequence above you'll get nothing back because the command shell can not figure out which stuff file you mean.
HTH,
Steve B-)