i assume you got the scythe...next in the customize your profile-->edit signature...
first insert the url of the link you want in your siggy like this one--->
[.URL="www.mobiles24.com"]www.mobiles24.com[/URL]
now just edit the part inside the [.URL]....[/URL] and put your image code there like this one...
[.URL="www.mobiles24.com"][IMG].......[/IMG][/URL]
http://i47.photobucket.com/albums/f1.../IceScythe.jpg
click on the image and you will see that it opens m24...