"Other than getting a new program like Bryce or some other to work in conjunction with Poser 6, what can I do in Poser to make my characters look more life like, especially in the face?" You certainly don't need Bryce, or anything else really. I would start at the most logical point... the facial expressions. Make sure you use expressions (especially on the mouth and eyes) that represent emotion of some kind. Never rely on pre-packaged "expression packs" that you may find in free stuff or the marketplace as a final result. Experiment on your own, and remember to account for some level of asymmetry, which is VERY important if you want to avoid the "android" or "mannequin" look. ;-) Eyes are the single most important feature on the face to make it look convincing, so spend a lot of time on them. As far as textures are concerned, there's plenty of photorealistic textures here in the marketplace that do a decent job, but without a good material structure, even the best ones will fall flat. Look into possibly investing in the "Skin Realism" kits by Face_Off. Sure, you can spend months tweaking your own shader system to simulate effects like SSS, etc., but his scripts provide the best results I've seen so far. After materials, lighting is definitely key. It might even be the single most important aspect to realism overall. I do a lot of my works with IBL/AO in P6, which helps bring out all the details and richness of your realistic textures, but it's not a requirement for realism. Learning how to build a good light rig is an art in itself. You can use pre-made ones, but there's no replacement for knowing how to set up lights yourself, and knowing how the work. Hope this helps. Good luck.

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Tools :  3dsmax 2015, Daz Studio 4.6, PoserPro 2012, Blender v2.74

System: Pentium QuadCore i7, under Win 8, GeForce GTX 780 / 2GB GPU.