I'm not sure why there would be a conflict, except that you can only have one on *:start: per script file. BUT...
Since we're only talking about 9 channels, we can tighten up the script and do away with the on start altogether.

Usage would still be /joinfave foldername

Code:
alias joinfave {
  window -hlp @Favorites
  set -su0 %fvct $ini(mirc.ini,chanfolder,0)
  while %fvct {
    aline @Favorites $readini(mirc.ini,chanfolder,$ini(mirc.ini,chanfolder,%fvct))
    dec %fvct
  }
  set %join.net $network
  set %join.foldr $1
  filter -cww @Favorites @Favorites $+(*,%join.net,*)
  filter -cww @Favorites @Favorites $+(*,%join.foldr,*)
  var %y = $filtered, %x = 1
  while ( %x <= %y ) {
    .timer 1 %x join $gettok($line(@Favorites,%x),1,44)
    inc %x
  }
  window -c @Favorites
  unset %join.*
}

Also, I still suspect that by server you mean network, in which case we could do away with the foldername too.
In that case it would be very simple to put the joinfave onto a status window popup, and eliminate typing smile


LonDart