The gimp.rar file you have requested: Tools and Utilities / Others / Gimp - 14.51mb 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:
This is gimp, a gnu image manipulation program. It's used to skin Halo 1 pc and comes with the dds plugin which is needed to skin halo.