Here, (Windows, VS2010 if u want to compile by urself) the simple tool, which do some "cleanup" for amazon .class-files. What is it do:
1) remove local variable names, no more
void func(int a, string a, char a) { a = a[a];}
2) rename one-letter class fields, to avoid mess in field names with base classes.
how to use. unzip amazon jar-files in folder with program and run it.
after it done, decompile classes with favorite decompiler.
mostly useful for 5.0.0 KT firmware
i hope, it will be usefull for anyone.
p.s. don't look at sources, it's pretty bad, i want to get fast result