I too have a LS capable pc burner, and was disappointed to discover that the pictures printed in greyscale, and not color. That was the biggest let down, since the ads and promos portrayed the results a bit more glowingly than reality. Since you have an HP, it probably has HP Image Zone installed, which is where Lightscribe labeling is located. When you start HP Image Zone, the image catalogue appears first. There you access your picture folders to select the photo you want.
Pick your photo then you click the edit tab. Under the Advanced tab near the top, you'll find B&W toolkit, which allows you to create a BW copy of your photo. Click the Create tab in the top toolbar, and options are posted, including Lightscribe. The picture you edited should auto appear in a preview window of the disc when you activate LS.
Text tab is where you select font style and size, and color-levels from white to grey to black..Placement of titles is however limited, but you'll need to check to see if Img Zone's are different from the Sonic software you've been using.
Doing a photo disc took my pc a very long time, longer than I wanted, given the final results. After that first usage, I stuck to simple text labels to finish out the spindle of LS discs...You results may vary, due to the system your newer pc has...
Dazed and confused over high tech.
Sigh...Concrap. The Internet Overlord Cometh
They're not com-tastic!