Will be a good solution when your file is missing somewhere in your disk.
WordHunter finds a specified text string searching every file under selected
target folder (directory) and lists up all the files containing the string.
Either data fork or resource fork can be a target and this is your choice.
>From OS8.5 Sherlock does this, but you have to make an index file first, which
will take a long time and lots of space. WordHunter does not require any
preparation, and is easy and pretty fast.