Try this...
For example:
irc.abc111.com = your chosen network #1
irc.efg222.org = your chosen network #2
irc.xyz333.org = your chosen network #3
Start a new script in your mIRC script editors REMOTE section. Paste the following text into the blank script:
on *:START: {
server irc.abc11.com
server -m irc.efg222.org
server -m irc.xyz333.org
}
; The -m switch allows you to connect to more than 1 server at a time using the same mIRC client session. For more info on /server command type:
/help /server in any mIRC text window. Hope this helps