Of course you can. How about creating a timer for each channel? How about creating a timer that calls an alias that messages each different channel?

Examples:
Code:
on 1:join:#: { 
if ($nick == $me) timerMsg_ $+ # 0 600 msg # However you get the message here is up to you I guess.
}

Code:
on 1:connect: {
if (twitch isin $server) timerMsgAll 0 600 msgall 
}
alias msgall { 
var %channels $ini(MSGALL.ini,Chans,0) 
var %i 1 
while (%i <= %chans) {
var %chan $ini(MSGALL.ini,Chans,%i) 
var %message $readini(MSGALL.ini,Chans,%chan)
if (%chan ischan) msg %chan %message
inc %i
}
}
Well, you can always start the same scripts using a different event though if you prefer using text events.

Nillens @ irc.twitch.tv
Nillen @ irc.rizon.net