Thank you!You can do that with SRD's Hudmaker plugin
You need to go into a battle scene, and then press ctrl + f12 to bring up hudmaker. In there you can add gauges for every aspect of any variable in the game, any pictures, and put conditions into when you want them to show.Pfffffffffft, no, the HUD maker doesn't let me do anything there.
No, you need to choose 1 or the other. Mog's will need to be adjusted in the code and edit images using photoshop / gimp etc..