Sorry, I think I my first post might be confusing...
The old mod changed only the .tga graphics in the SRM. When you want to fire at a compartment by just klicking on the hitzone, you had to be within 1000m range to the target. But if you are outside these 1000m you can aim at them with your periscope and the right torpedo depth. The hitzones were just marked on the .tga file. Wich can be done on a weekend full of Photoshop-fun, editing the .tga's.
But how can I achive the graphics of the hitzones, to add them to the graphics of the SRM? (Without taking screenshots, if it's possible...
)