First right click on the attachment avatar I posted and select "Save Picture as",,,That will put the avatar in your "My Pictures" folder on your computer if you have windows...

Now login to Canabis.com and click on the "User CP" a the top left of the page...

Now on that page to the left click on "Edit Avatar"...

Now on that page in the center toward the bottom click "Browse" and navigate to your "My Pictures" folder and select the avatar you just put there...

after that click on "Save Changes" at the bottom...