Go to Not-GSOAR
 [https://auth.goonfleet.com/newbies/] 

Clink the link that says:
"  [ I am registering under a Member Corp or I am an Ally ]  "

Add your API info to become authorised
 [http://community.eveonline.com/support/] 

Choose the character that is joining the Goonswarm; that will also be your forum name

Enter an email address. You will need this to log into the Goonswarm forum. That is the central hub for authentication of Gewn services

You will be sent an authentication link in an email to the address you have just provided

Click the authentication link. You will now see a page which contains your login information. You will see your forum password AND your ESA password for Jabber, Teamspeak and Mumble

Go to the Goonswarm forum and login with your password and email address  [https://goonfleet.com/] 

Go to ESA. Create a new password of your choice for Jabber, Teamspeak and Mumble
 [https://goonfleet.com/esa/] 

Download Mumble
 [http://mumble.sourceforge.net/] 

Complete the wizard process and creat a new server connection:  ( Server  »  Connect ) 

Click the  [ Add new ]  button

Complete the fields:
Label (Anything you want)
Address mumble.goonfleet.com
Port 64738
Username is your Goonswarm forum username with your alliance or corp tag
 (eg. GEWNS - Solo Drakban) 

Click  [ OK ]  to return to the server connect page. Select your label (the server) and click  [ Connect ] 

Enter the password you setup in ESA on prompt.
Accept certificate warning on prompt.

 That's it, you've made it! You Rock!