How do you get a picture in your signutare?

You need to stick the URL for the desired image in between the Image tags which are [*img][/img] without the star so it would look something like this.

[*img]www.yourpichere.net/hfdskhfds[/img] yet again minus the star

it didnt work

You need the URL of the image itself not just the website it is on, easiest way to get the pictures URL is to right click on it and hit copy image location then put that between the tags. If this doesn't work I'd suggest saving the image to your computer then go to an upload site such as photobucket and upload it there, they provide you with the direct URL and they have one box with the tags already added.

tinypic.com is good to upload as you don't need membership

True, Imageshack is another good free one but I prefer photobucket because it's easy to find your pictures again if you lose the URL.

im going to use photobucket