Building on some previous posts on FM synthesis (Pt. 1, Pt. 2, and Pt. 3), in this video Brian demonstrates how to use the Morph Square feature in FM8 to generate dynamic, rocking lead sounds.
Best of all, you can download the patch that Brian uses in the video below.
Also, if you like the drum sounds in the video, you can find the Wave Alchemy Drum Tools sample pack from whence they came here.