First you need to get IRC client, the simplest one is
webchat, just enter your nickname and you can
join chat.
Here I will explain how to join #soldat.eat-this! with the most popular IRC client:
mIRC (click to download). After installation run mIRC, select options
1, fill
2 with name and email (can be fake), your nickname and alternative nickname then select servers
3, find random Quakenet server in list
4, select it
5 and connect
6, then type in status bar
/join #soldat.eat-this!.

Auth yourselfWhen all is done you can auth yourself by using
/msg Q@CServe.quakenet.org AUTH nick password command replacing nick with your auth name (nick what you chosen when creating auth) and password with your current pass.
New authTo play ttw gather you need an auth. To create one type in status box
/msg q hello email email, replacing email with your email
e.g. /msg q hello
gather@gmail.com gather@gmail.comAfter that you should receive confirmation message on that email which typed with password to your new auth.
Change passwordTo change password you need to type
/msg Q@CServe.quakenet.org newpass oldpass newpass newpass where oldpass is your old password and newpass is your new one.
f.e. /msg
Q@CServe.quakenet.org newpass 5GH82R4 TTW123 TTW123
Autojoin and authFor that you need to open script editor (Alt+R)--->Remote and paste there that script replacing "..." with your own data:
on *:connect:{
nick "nick"
msg Q@CServe.quakenet.org auth "nick" "password"
join #soldat.eat-this!, #ttw.live
}
Now you do not need to auth yourself everytime you join the channel, will also auto join to that channel.