Would anyone give me advice on how they set up scenes.  
For Example:
I realize different scenes are different lengths but as a general rule of thumb or average how long is a standard scene set up 30 frames 100 frames?
When working on the scene do you add all the characters at once AND the background then start animating or do you kinda rough at one character at a time then put them in together with the background and adjust accordingly?  Just any advice on how I should be setting up my workflow.  Heres what I earlier and it didn't turn out so well.  
1 I put it michael and 100 frames
2 then I added AHEV armor conformed it
3 added the running animation from walk design from 1-30 then walk from 31 on
4 added this huge sci fi background prop called OM think it stands for mons
when I preview it it starts to walk then skips abuncha frames and does nothing
so then I rendered it then movie animation standard settings microsoft compression 100% quality he runs for like 1 sec starts to walk but quits after one sec then 3 secs so I guess 100 frames= 3 seconds? but why won't it show me the correct way he will walk in the "preview?"
Finally does anyone have a link to a smiple scene I can watch and get an idea of how you did it?
Thanks 

There isn't really a good standard length in frames.  I usually
separate the PZ3's based on where Poser requires a split.
A walk path definitely requires one PZ3.  Any time you change
parenting, or select a different camera, you need a new PZ3.

Put in backgrounds and such after you get all the moving parts
settled; adjusting will be faster if Poser has less stuff
to think about.

Let the framecount for each scene change according to needs;
start very low and increase as you need it. 

It's easiest to start low on the Frames Per Second also.  Poser
uses 30 FPS as default, but most web-animations are less than
that; especially if you're going to use SWF for the final, you can
get by with 10 or 12 FPS.  If you start low, you'll have fewer frames
to mess around with, and you can always Retime to higher
rates if needed.  

Render in preview mode [not render mode] for trials, and
don't use Poser's compression for anything.  For a trial AVI,
use uncompressed, and for the final, use separate frames.