Finally switched to PS.

So I downloaded CS5 Extended, etc etc.

Here's my first two sigs made with it + some "Disco" text:

 

The second is pretty good, but needs improvements. The right side needs to be blurred from the rest of the signature. It's too distracting. The lightsource needs to be bigger and like 2 pixels to the left, as that's where the light source on the stock is coming from. There's like a splatter brush on the focal. Erase a tiny bit of it. That's all I can cc on. Good job.

 

Remade using your tips:

 

Change the blending mode of the lightsource - currently a white soft brushing does not look good.
The changes you made are CONSIDERABLY better than version one.