1) Download this link: https://www.mediafire.com/file/s02kuwtgmstwmow/File+179.prs/file and paste on folder: Ultima PSOBB\data\items\model
2) Download this link: https://www.mediafire.com/file/df0e6ue79jybctj/File+179.prs/file and paste on folder: Ultima PSOBB\data\items\texture
3) Please rename both files, you will see it like this: "File 179(3)" or "File 179(4)" just erase type this name: File 179 in both folder model and texture this way should work.
4) desaquip and equip your Darkflow!