To auto-connect to server when you start mIRC, you can use the ON START event. For SSL enabled servers you need to specify the -e switch in the /server command.
Example:
on *:start:{
server irc.server.here -j #channel1,#channel2
server -m some.other.server -j #channel
server -me ssl.enabled.server -j #blah,#bleh
}
This would instantly connect to 3 servers. The -j switch is so you can specify channels to join once you connect to that server.
Regards,