custom reticle problem

Not quite right. I made custom crosshairs, not reticles, they are not the same thing. The crosshair's don't move/change size to reflect the amount of spread, but the normal reticle is still there so you can still see how much spread you have.

Yes, I released one of them in a pack I did.

If you are referring to my crosshairs, they aren't a texture file you can edit. They are shaders I wrote to algorithmically create the crosshair on screen.

You need to know how to write vertex and pixel shader programming, along with the mathematics involved to algorithmically create the design you want to make. If you don't know how to program nor have good linear algebra math skills, I wouldn't recommend trying to do this.