The q3_devel_full.tar.gz file you have requested: Tools and Utilities / Tools / Q3ServerKit Version 1.5 - 946.18kb is not available. Perhaps try browsing all files for the game Quake III Arena and upload any files you want to share or are missing. This is the only information we could locate:
The new features include a new menu to change weapon speed and reload time. It also has a grapple on/off switch and the option to have unlimited ammo.