Hi Ctrax,
Here's one trick that I sometimes use.
You'll lose the smart-capabilities of your snapshot area, but it gets
the job done.
Select (highlight) all the shapes that you need, including those that
partially stick out of your snapshot ares.
Copy them to the clipboard (Ctrl+C)
Edit > Paste Special > ...as Metafile or Enhanced Metafile.
Now you have an object that you can crop to, say, get rid of the walls.
This object is a vector object, so it will print and scale nicely, but
you've lost the Visio-ness of it. You can't interact with the shapes at all.
--
Hope this helps,
Chris Roth
Visio MVP
Register for the 2008 Microsoft Office Visio Conference!
http://www.msvisioconference.com/
Visio Guy: Smart Graphics for Visual People
http://www.visguy.com