Ok, ive used worldcraft (now the valve hammer editor) before, when i was breaking/modding half-life.
it may seem difficult to setup worldcraft at first but you get used to it ^_^
what you need to do to get a .bsp file out of worldcraft is set up the compile programs in the "build programs" tab of the "tools" and "options" menu.
I'll take you through it, just in case you arent too familiar with worldcraft
Click the "tools" option on the top menu after opening worldcraft, and select "options" Next click the "build programs" tab. Below are the settings you should enter (presuming all your compile programs are in the C:\worldcraft\tools... directory
CSG executable = C:\Worldcraft\tools\qcsg.exe
BSP executable = C:\Worldcraft\tools\qbsp2.exe
VIS executable = C:\Worldcraft\tools\vis.exe
RAD excecutable = C:\Worldcraft\tools\qrad.exe
you can also find some worldcraft setup tutorials on half-life sites like www.planethalflife.com i think
i hope this helps, post again if it doesnt and i'll try to help more
You could take over the world with a programming language like this...
...I wasnt joking!