I'm going to say this one more time. There are maximum of 32 categories. If you wanting to use category=30 for your own purpose, you need to change the .bmp for 30. Do NOT delete anything. BTW, the .bmp that you're modifying is not the one going to be displayed, it's the one showing in the menu of the configuration screen. You will also need to change the "sprite" bitmaps for that speedcam as well.