I run my lightscribe discs through twice but I'm beginning twice is a bit too much. The discs get faint swirl marks if I run through twice. I heard that there is a program extension that will allow for a little-bit more time but NOT twice as much. I run SureThing label creator. Is there a extension to this program?

It's called "Extended Label Contrast Utility" and you can get it from the LightScribe website. You'll probably have to update the LS driver as well, since both have to be the same version no. to work. The "Dark" option will then be equivalent to running it twice in one go.

I find that swirl marks are visible on larger dark areas in the picture, so try not to use these type of images (or print the "negative" image).