its quite tricky to find an 'manual jb tutorial'
so I think manual jb means:
1. after getting root-access I have to switch in USB-download mode (doesn't matter which way)
2. copy the actual jealbreak datas on my kindle.
The actual jb should be "JailBreak v1.14.N" mentioned by NiLuJe.
3. entering my kindle in diagmode over serial and executing the JB.
4. then it should be jailbroken and i can install MRPI with this I can install USBNetwork and Kvncviewer
Am I right
or did I forget something?