take these .tga files out from the e.g. int_rb2.pssg you've donwloaded or any ohter car-version from the leds mod
than you replace all of them in any orginal int_xxx.pssg in you F1 2012 rootfolder called interiors
that means open one of you original int_xxx.pssg in you game with the pssg editor and import these tga files from the modded file in you original file and when you done it right it must hopefully working right with 1by1 light
I´m german too
but okay i understand and will try it ASAP when i´m at home
I only change int_digi_tach_full.tga and int_digi_tach.tga so i´ll change the other files as well
Thanks