weird any of that things not works correctly :P
installer doesnt skip if regkey exists - always run
installer dont run nv_arc.exe if regkey exists
now i only know that its loader for original installer and after that run sfx archive
edit
my version based on peterf1999
and both script mine and peterf1999's
edit2
ofcourse thanks for peterf1999 for showing that pro method
im glad to see so new pro users