It didn't work?

That's strange. Here follow these steps EXACTLY.

  1. Open the uncropped image.
  2. Select box tool or Beizer
  3. Box in the viewable area
  4. Select the boxed area
  5. SHIFT+Click on the outside area.
  6. Go to OBJECT>CLIP>SET
  7. It will now crop to that area.
  8. You can now export the image as a PNG (TIP: Use the SELECTIO option if you want ONLY that area saved.)
Here is an example of a PNG file I cropped.
Example Croped

Here is the original image:
http://www.freewebsitetemplates.com/preview/halo/

If it doesn't work, something in the steps you followed are askew.


John R. Culleton wrote: 
On Tuesday 29 May 2007 10:53, Jon A. Cruz wrote:
  
On May 28, 2007, at 1:01 PM, Dave Niezabitowski wrote:
    
Flattening I guess would be about the same as grouping in InkS.
Select all the items you want together. CTRL+G to group them.

Then draw a box around whatever it is you want to keep.
      

A box object or a selection? Neither one worked for me. IMO a crop 
tool would be most useful.

  
OBJECT>CLIP>SET

Bam! Cropped image.
      
Be aware, though, that the other stuff remains in the image, just
invisible.

A destructive crop action could probably be done via boolean ops.

    
Seems likely. I'll try that when I have time. In the meantime I'll do 
screen captures of segments. I know how to make that technique work, 
crude as it may be.