The SparkEdit_31.zip file you have requested: Tools and Utilities / SparkEdit / SparkEdit v31 - 283.83kb is not available. Perhaps try browsing all files for the game Halo: Combat Evolved and upload any files you want to share or are missing. This is the only information we could locate:
SparkEdit program created by Grenadiac. It lets you open Halo maps and view them in 3D while modding certain aspects of the game.