mx_clover don't use the last version of Greyhound, it will extract the ximages files with a ximage_randomnumber name. Use 1.23 versions instead.
This way, you'll get correct filenames.
Last but not least, just type the first letters of the texture you're looking, otherwise some specular maps won't appear. For instance, type only "ballist" to get every texture map of the Ballista.