The BSP_Water_Tool.rar file you have requested: Tools and Utilities / Tools / BSP Water Tool - 18.61kb is not available. Perhaps try browsing all files for the game Halo 2 and upload any files you want to share or are missing. This is the only information we could locate:
With this Halo 2 program you can add water to any Halo 2 (xbox) maps. With this program you can add water to any Halo 2 map!