The original OutputFile.asp does not correctly assign the value to the variable ImageFileType. It never gets set to true. As such the code to insert an image and have it displayed is never exectuted.
You need to insert the following at line 135 (between the end if and
'###### Check for invalid chars in filename)
Check out this post about half way down the page for more info on additional formatting to make it look how you might want.