Lim's Extra Belly? (Newb Question)

Hey, folks. Recently, I've given serious thought to trying out vore on SecondLife. As such, I'd found an avatar I want to use, as well as what seems to be a very potent vore-belly thing: Lim's Extra Belly. Now, the reason I'm making this thread is as such: I'm completely in the dark about how to do SecondLife. For anyone else who might have the accessory, does the belly mesh go off of whatever skin/fur/whatever mesh you have for your avatar? Or, it is a default color, mesh, et cetera that needs to be modified? I intended to use one or two avatar skins for two alts: A lioness for my fursona, and This tigress for another alt.