Is there a way I can take V3's eyeballs and use them in V4? I assume I need to somehow make Smart Props from the V3 eyes, but I don't know the process (if there is one.)

Thanks--Tim

Here is how I would do it.

Load V3, select the right eye. Open the Grouping Tool, click the "Create Prop" button, name the prop "RightEye". Using the dropdown Body Parts menu at the top of the document window, select the Left Eye, click the "Create Prop" button, name the prop "LeftEye". Close the Grouping Tool. Delete the V3 figure from the scene. You should now have two eyes in the scene.

Load V4. Set the Figure Display Style to be Wireframe. Position and scale the LeftEye prop so it fits over V4's left eye. The settings below should be somewhere near correct, you may need to tweak them slightly.

Scale=118.5000
xTran=0.00115
yTran=0.01190
zTran=-0.00060

Position the right eye to the same settings as the left, only set the xTran value to a minus number, eg xTran -0.00115.

Apply any desired textures or other material settings to the eye props.

Do Memorize All (Alt+Ctrl+A). Make sure Poser is set not to use file compression. Open a props palette, save the eyes as a prop, using "Select Subset" to include both eyes. Open the resulting pp2 file in a text editor.  Find the line in the RightEye that says "parent UNIVERSE" and replace it with "smartparent rEye". Find the line in the LeftEye that says "parent UNIVERSE" and replace it with "smartparent lEye". Save the file back to disk. If every thing went as planed, the job is done.

In Poser open a new document, load V4, hide both her eyes. Load your eye prop. The eyes should automatically parent to V4's eyes and move with them  when you move V4's eyes.

Thanks!!! I'll give this a try.--Tim