Is it possible to run a script/commands on channel connection using Amirc?

Basically I just need to connect to a password protected channel on joining a server and changing my nick automatically.

Already explained on IRC but just for completeness. Create new icon for AmIRC and use tooltypes (remember to set default tool to your AmIRC):

Connect
Config=Default.AmIRCfg
Server=lindbohm.freenode.net
Nick=itix
Autojoin=#channel1,#channel2,#channel3,#channel4 password,password2,"",password4
Port=6667

Thanks very much itix, great solution.

There is also a PASSWORD tooltype, for use with a registered nick.