Just a follow up. After some work on the configuration of the .KRZ files, I am really happy because everything works fine.

Thank you to Jeff, you were very patient and helpful.
So I post the two methods to create HFE files on the SD card.
Method 1:
put some .krz files into a folder on the pc (max 720Kb of files). You can do 1.44 mb of files too, you just have to 1.44mbDSHD fat 12 instead of 712K
After this :
Button "Create FS Floppy"
Choose " 3"5 720KB DSDD FAT12"
Button "Inject directory"
And choose your folder
After Export it to HFE file...
Method 2:
Put some krz files into a folder on the pc (max 720Kb of files) with a .fat720 at the end of it's name (example tubular.fat720 )(if you want to put a larger file you have to do a .fat1440 file)
Drag&Drop the folder on the software
After Export it to HFE file...
With those methods it's very easy to do a SD card full of sounds for the K2000.
Now I have to find a way to fit the HxC2001 in the keyboard. I have my idea but I have to find a way to detach the LCD from the PCB and connect it an other way (not to difficult). When everything will be donne i'll post some pictures of the result.
