The dstk_art_packs_rock_beast.exe file you have requested: Models / ArtPacks / DSTK Art PacksTM - Rock Beast - 1.17mb is not available. Perhaps try browsing all files for the game Dungeon Siege and upload any files you want to share or are missing. This is the only information we could locate:
The Monster Packs contain a variety of creatures found throughout Dungeon Siege. They include the model and a variety of animations for fidget, death, movement, and appropriate weapon attacks. An Art Pack for Siege Max. Version 1.1a of the DSTK is required to view and edit these files in Siege Max.