Laura and Luke will be found in the DAZ People folder.

If you're using Poser 5, you should install any morph-injected figures to the main runtime. Either that, or copy the !DAZ folder over to the main runtime.

The way those !INJs work, you won't see any change just by clicking on the icon. All that does is put a dial in the body (or head, if it's a head morph). From the parameter dials menu, find the newly injected morph, and dial it to 1. Then you'll see the morph.