If you have expierienced "Script type 'master' differs from architecture problem" error message after pressing Kray's buttons on Layout, install Kray_anim.ls,Kray_frame.ls,Kray_options.ls to the same dir where you have Kray.ls installed and add them to LightWave's plugins. Then replace KrayAnim, KrayFrame, KrayOptions buttons in layout with their Lscript equivalents (named with "_" included : Kray_Anim, Kray_Frame, Kray_Options).