If you don't plan on using Worldcraft to compile your maps, then this section is irrelevant and does not need to be filled out. If you're ready to setup the Build Options dialog, read on. If you've only created a Half-Life game configuration, that's all you'll have access to here. If no Configuration is shown, click on the Ok button to return to the Worldcraft screen, then select Options from the Tools menu again and click on the Build Programs tab. The Configuration you've previously created should now be listed.
Game Specify the game executable here.
Select hl.exe and click the Open button. BSP Program Specify the BSP program here. The Half-Life BSP program is qbsp2.exe . It can be found in your Worldcraft 2.x directory. Select it as you did the game executable.