How do you use Sure Delete? I'm worry that it will delete the files that I still want instead of permanently remove the files that already deleted from my harddisk. Is there other software that you guys would recommend?

Removing it from your recycle bin should be sufficient, unless you live with some pretty good experts who want to get at your files.

The only real way to remove all traces of a file is 10 minutes with your Hard Drive and a hammer, but I've got to say that won't do for just one or two files...