To make yourself invisible to other users (except staff members), select "Profile", click on "Modify Profile" at the top, scroll down and change the setting to "Stay Invisible - Yes", then click on "Modify Profile" at the bottom.
First of all you need your avatar to be uploaded to somewhere on the web. Your own website, or an image hosting site like Photobucket. The picture must be no more than 100x100 pixels. Then on this site, click on "profile" at the top of the page, then on "Edit Profile". Under "Personal Information" is a field "Avatar URL" into which you should copy the URL of your picture on the web. Then click "Modify Profile" at the bottom of the page and it is done.
Thank you for the improvement, I was not very happy with my work. My computer knowledge is not the best. But certainly with your help it work better. Also, my English is getting better. 'll take lessons.
Hopefully we'll meet next year, once at a concert by Hayley. I wish you a Happy Christmas and a happy new year.
To post an image in your signature, first host your image at Photobucket in the same way as your avatar. Then go to your forum profile, click on "Modify Profile" at the top, scroll down to "Signature" and type the url of the image between image tags like this:
Finally click on "Modify Profile" at the bottom. Your image must be a jpg or gif file, with a maximum size of 100KB and a maximum width of 800 pixels.