does me7sum fix the error with adding nls and 2step via the script?
cause unless i did it wrong it didnt fix my no start p0601
and when i came here for help marty and sb_gli helped me out and used ecufix
No, because you are mindlessly using a script to modify a file without understanding the side effects. Is NLS that important to you, especially a broken implementation that you don't understand?
Disabling RSA checking is not "fixing" anything.