You can create a directory be hide the phrogram directories and put you images there or you can add them to the images and or sounds directories already in phrogram/KPL. Go to the right side of the IDE to the files panel and then go down the file tree to the 'Media Files' directory and expand it you will see two ...

This shows autocomplete in action in the Phrogram code editor.  To bring up the autocomplete list, just type CTRL+J when in the code editor.  If you have begun typing a word, the list of suggested autocomplete will be filtered to things that match what you have begun typing.

This shows Phrogram's interactive debuggin in action in the IDE

This shows the use of line numbers in Phrogram, including to identify and locate errors in the code editor

This shows and described the use of the splitter controls in the Phrogram code editor

This shows the different elements of Phrogram's code editor