Thanks all for bringing this up, as the interplay between pixels-per-inch, pixel dimensions, and printed resolution (DPI) can be confusing at times. By way of reassurance, we (the e frontier Poser team) are aware of this issue and a fix will be included in our first Poser 7 Service Release, which should be released early in 2007.

For the moment the solution described above by ArdathkSheyna (render to the correct pixel dimensions, export the image, then change resolution in Photoshop, PaintShop Pro, etc.) will allow you to create images at the size and pixel-per-inch settings you need.

The thing to understand is that, when you render an image to a specific pixel dimension (e.g. 1600x1200) then regardless of the pixels-per-inch setting the same number of image pixels are being created- in this case 1,920,000 of them. At 72dpi, that image would be 22.22 by 16.67 inches; at 300dpi, it would be 5.33x4 inches, but there are the same number of image pixels regardless. Print images use a higher pixel density (more pixels per inch) than images displayed on computer monitors, so renders for print should necessarily contain more pixels for the same size in inches, but that's easily managed by rendering to exact pixel dimensions (which is also necessary for animated renders; scaling video down- or worse, scaling it up- can greatly reduce quality.)

Hope this helps!

-- e frontier Tech Support