These liners have both a hang bead and a V-bead on them so they can be either snapped into a track like a hang bead or can be attached directly to the wall like a V-bead liner. If you are using a Uni-bead liner as a V-bead no modification is necessary. If you are using a Uni-bead liner as a hang bead liner the V-bead must be removed first. Simply score the liner in the groove directly above the hang bead and peel the V-bead off. Then you can simply snap this liner into your liner track.
Example of Unibead liner being used as a hang/true bead liner in track