I found out how to get the CPU Usage pro process but it din't gave me a result on the System idle Process...
Current Output is:
Name: [System Process]
PID: 0
Thread: 1
Mem Usage: -
------------------------------------
Name: [System]
PID: 4
Thread: 56
Mem Usage: 240 K
...
Maybe it had to do with MadKernel???
For any other Process I get all informations but nothing for the first one above...
I don't believe you can ask anything about PID 0, regardless of how many access rights you have. This is not about madKernel, this is all about access rights/privileges.