I think you are looking for the $iif identifier:

Code:
menu * {
  $iif($script(who2.mrc),whois/whowas):who2 $iif($menu == $nicklist,$snick)

  $iif(!$script(who2.mrc),Who)
  .$iif(!$script(who2.mrc),whois):whois $iif($menu == nicklist,$iif(!$1,$$?="Nick",$1))
  .$iif(!$script(who2.mrc),whowas):whowas $$?="Nick"
}


Notice the . and : go OUTSIDE the $iif statement.

-genius_at_work