A few people have asked about how to make their own siggies so I made a short and simple tutorial here (for photoshop only)
(and I am sure there are better ones out there if you want a more complex siggy - and lots of the siggy makers use different tools and may be able to help you if this does not match your style)
(and I am sure there are better ones out there if you want a more complex siggy - and lots of the siggy makers use different tools and may be able to help you if this does not match your style)