Right up front I'll say I'm not very good at lighting, but:

I don't think you will be very happy in the log run if you rely on canned lights, because lighting is extremely organic and very complex.  A particular light set that you buy might look great for this particular character with that particular pose, but change the pose or change the texture or materials settings and you change everything, often drastically.  Portrait lighting is the "simplest" to get the hang of, but even then it isn't very simple.  It's particularly easy to abuse colored lighting (I'm guilty of that).

The gallery image you're pointing at does make heavy use of subsurface scattering (imo a tiny bit too much).  I think it's fairly likely it wasn't actually rendered in Poser, but rather set up in Poser and rendered in an application with a more powerful lighting engine like Cinema4d.  The lighting has the look of global radiosity to me, which Poser simply cannot do, although I understand it can be simulated in Poser.

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