HaloMods "Classic" Read-only Archive

I am trying to start modeling but i cant find the guerilla and i downloaded HEK but when i try to open it it says play now or cancel and i click play and nothing happens please help thank you

Have you had HEK before prior to this install? if so you need to delete the old tags , mainly the TAGS directory. and also you should think of redownloading HEK if that doesnt work. when you install something it tells the comp to write in the regisitry that this is installed. so the program will check for that registry value if its there....then it will just give u an option like play or cancel. theres an uninstaler in the directory since they were too stupid to incoropate one into the INSTALLER