I'm not sure if I understand you correctly so please bear with me if I'm not making sense L When you move your character it won't be rendered any more. You'll have to render it again to see it er... rendered. You won't need to render all the time, only when you're done posing and setting up the scene. Another possibility is that you're not seeing the character in Texture shaded mode. The little "balls" that is usually located below your workspace window determines how you will see the preview. click Ctrl 9 to make sure you're in texture shaded mode (I hope I'm right, I'm not at my Poser PC right now...) What you're expiriencing sounds MOSTLY like you're not using Texture Shaded mode for the preview. One last thing, not necessarily related to your problems, but... You do have the latest patch for your Poser 5, right? SR 4.1? Available from Curious Labs' site in case you haven't got it.

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You just can't put the words "Poserites" and "happy" in the same sentence - didn't you know that? LaurieA
  Using Poser since 2002. Currently at Version 11.1 - Win 10.