this is a nice auto join script for bots, all you have to do is type ?auto add|del|list #channel to add delete or list channels set for the bot to auto join when it connects, make sure to replace A_A with your own nick though, wont even need to go into the bot's mirc to edit the startup channels =)

on *:TEXT:?auto*:#: {
  if ($nick == A_A) {  
    if ($2 == add) {
      if ($istok(%auto.channels,$3,44)) {
        msg $nick Channel already exists.
      }
      else {
        set %auto.channels $addtok(%auto.channels,$3,44)
        msg $nick Added $3 to my auto-join list.
        join $3
      }
    }
    elseif ($2 == list) {
      msg $nick Current channels on auto-join: $replace(%auto.channels,$chr(44),$chr(32))
    }
    elseif ($2 == del) {
      if ($istok(%auto.channels,$3,44)) {
        set %auto.channels $remtok(%auto.channels,$3,44)
        msg $nick Removed $3 from my auto-join list.
        part $3 Removed by $nick
      }
      else {
        msg $nick Channel doesn't exist.
      }
    }
  }
}
on *:connect: { join %auto.channels }