Well, I just hit the "print screen" button on my keyboard....then paste it in paint or paint shop pro....there are other ways too.
Not sure what you mean by creating more scenes....you can't create anything with the Driver edition...what you see is what you get. You may be ready for one of the full editions...
PrtSc key also places a copy in the Trainz Screenshots folder so you don't have to use the paste into a graphics program. This also allows multiple screen shots to be saved in a session.
Once you have taken up to 999 screen shot's of your route/layout, etc, etc, you will need to convert your images from their existing larger file format to a much smaller format like "JPG - JPEG" images... (basically this reduces the individual screen shotfile size to a far smaller file size).
Download and install; - http://www.irfanview.com/main_download_engl.htm
Then convert your images to "JPEG" images. - Hope this helps...
Cheers, Mac...