Thank you for your replies!
1.) I patched my PhatBox with my original DMS
The text-to-speech lady told me that my box is gonna be patched
(told me the patch starts, it skips some tracks, then announced the playing track followed by the track)
after that the dmstools told me that my box is patched.
2.) I then created a new DMS (with my 2,5" 30GB HDD)
Selected "VW V6.0" (No "Non-hacked FW"; No "Reflash firmware") [FW V6.0 was on the original DMS]
3.) Created the bootlog.txt
4.) Put some music on it with the phatnoise mm, and gave it another turn.
=>
It doesn't boot nor is the bootlog touched.
The led order on the phatbox (in order of appearance):
-Solid Green
-Solid Red
-Solid Green / Red
-Slow Green [Blinking; 1s delay]
-Fast Green [Blinking; instant on/off]
Do you know the meaning of the led signals?
Is my box really patched? (No "Your box is patched"-text)
Or do you need any more information from me?
Every time I put my original dms back in, my cd-"changer" is available.
(I've put the "CF-card project" on hold, 'til the hdd works.
)