OS= Operating system, like windows, linux, ect.
Well, if you tell me when the crash occurs it might help correct this.
I would also make sure both mods are placed in Steam\steamapps\common\Turok 2 - Seeds of Evil\mods, and if there is no "mods" folder, make one.
Kind of at a of loss what could be wrong if everything is placed correctly and it's still not working for you.