Register to the Nickserv on SystemShell
Start by connecting to IRC, and make sure you are on the right IRC network (irc.allshells.net). If you don't know how to do this see ["Info/IRC"].
To register with NickServ send type this command into IRC: (replace <password> with your password, and optionally enter an email adress)
/msg NickServ REGISTER <password> [email]
This will register your currently used nickname. Change your nick (/nick <nickname>) to the one you want registered before sending this command.
It is not allowed to pick a password wich is less than 5 characters long. Beware that your password is case sensitive (which means foolish, FOOLISH or fooLish would be three different passwords.)
Now you have registered your nick with NickServ, and what's more, you are also already identified.
For more information type:
/msg NickServ HELP REGISTER
Now you have to identify yourself each time you connect to IRC. To identify use this command:
/msg NickServ IDENTIFY <password>
You now may want to play around with NickServ. Feel free an try some commands like
/msg NickServ HELP
You may also want to speed up this process by making an irssi alias.
/alias NS /msg nickserv
where, NS is the alias you want to use. To use this alias, you would do
/NS {IDENTIFY,REGISTER,HELP,or any other nickserv command}Have fun! And don't forget to join #blinkenshell and say hello to independence 
/join #blinkenshell