Photo Shop is good but I really like GIMP. IMHO
Also, you can download FPI EditPad.
After you create the HUD image, then . . .
. . . click on the Create New Document icon and select FPI. From here click on "Insert" and first insert the FPI template. Now click on "Insert" again and click on the "Hud definition" option and follow the instructions. First thing is to find and select your HUD image.
Learn how to script. Tutorials at top of this forum. Learn more how to use FPI EditPad and this also will help you in your scripting.
EDIT:
BTW, creating a subject name that has to do with your questions will then include your thread in another person's search. APOLLO's search engine only searches the subject line and not the body of the message.
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Make life a little easier and use
FPI Editpad for your sctripting needs.
The past has a lot of memories to hold onto; but, today is chock full of new adventures, and, the future shouts out, "The best is yet to come!" -- TerryC