Bjoern’s Sample Mapper is pretty easy to use – there’s really no set up. There is a bit of a learning curve but its not difficult if you’re familiar with SFZ. It can be used to parse the .wav files by name and map them roughly to the keys. The drag and drop is a little finicky, but if you have some knowledge about the SFZ format, it’s a great tool.
It’s especially great to start the SFZ file with Bjoern’s Sample Mapper and then later edit with a text editor.