Hi Ranger, the way I find folder names is to save an item's DEFAULT Skin in skins folder. You do this by right clicking on items name in HANGER LIST, then selecting - Save Default Skin -. Now go to SKINS Folder and look at name of item's FOLDER. The name of this folder is what HiTech has deemed the model's link to cache files. It is interesting that Wirbelwind also works with this model. A lot of patches are already materializing with the 2.12 release. These patches could cause the exact folder name to be the ONLY one recognized by the cache settings when game loads. Just a thought, it could save misery later on.
UPDATE ! after downloading 2.12 Patch 1, Wirbelwind Folder is NOT recognized. It will have to be named Wrblwnd for these sounds to be driven in cache settings.