Now it´s clear. The >packed< HDL interfere with the hhosdsys.
Will do sum more tests...
Update: YES, it´s tricky to embed an elf and you have to take care what packer and what compressor and decompressor is used...
Anyway, here i can confirm it works with PAL PS2. Now i go and install all my tools... :D
More interesting would be how to get a valid boot sector to the hdd so the pal hddosdsys is loaded automaticly!?!