I use these files especially with wxrdr22.  In order to do this, I put
a line such as "photo scrn" in my bat file that envokes wxrdr22.  When
there is a picture on the screen, I press the LEFT SHIFT key twice and
it saves the picture under the name scrn.000; scrn.001; scrn.002 etc.  
When I want to view the pictures that I saved using photo.com, I use either
the view scrn.??? or I envoke the v.bat file.  I have both the photo and view 
files in my path so I can use them on any program at any time.  I have had
no lockups or problems of any sort and it seems to be the only program that
will save the ega pictures.