Looks like the Desire S is using stock leaked 3.0.16 HTC kernel. m-deejay didn't make a custom one for it. I'm not fully sure of the following but I'm not finding many people who made 3.0 htc custom kernel releases to work with, and most are variants of CM in the first place.
99.9% chance that saga kernel will not work for ours, but the rom should likely work fine after replacing the correct files. Saga and Vivo are almost nearly interchangeable except for the kernels.
If I had time I'd be willing to mess around, but these days don't have much time to tinkle with trying to make something work.