I'm not sure what you mean by "stuck files", but if you're referring to files that the Trash can't delete, here's how:
Use the command "rm -rf filename" to delete your .Trash file in your user directory. If you need to delete a file you don't own or have write access for, add "sudo" preceding the command: "sudo rm -rf filename"
A word of warning..."rm -rf" is a powerful command that deletes files w/out prompting for confirmation. Make sure you know what you're doing with it, because it's easy to make a mistake and trash the wrong files.
If you have problems/issues in dealing with the Terminal, try the excellent "Pseudo" - downloadable from VersionTracker. It lets you work with the files as administrator: No mess, no fuss - just drag-and-drop on the icon, and you're instantly in "Root".
The other way - boot into OS9, and empty the trash...