I tried installing GhostBuster, but I don't know how to make it work properly

I should copy the GhostBuster (and .info) file to my WBStartup *check*
I should ad a "NOWAITDELAY" tooltype... I tried unsuccesfully
I should copy the proper Workbench version to my Prefs folder.... does that mean overwrite the Workbench file there or simply copy the Workbench39 file there ??
Sorry to be such a noob but I need help
