Thanks, got the dual boot to work with the preconfigured files but then when I try to partition the phone with moslo:
flasher -k zImage-moslo -n initrd-moslo -l -b

I get a message: Fatal repartitioning failed, so I try it again and it says patitioning succesfull.

Then I restart the phone and the dual boot still works but when I try to start Harmattan so I can install Sailfish I get a fail message:
Boot OS/kernel selection failed!
Please run maintanance boot.
What am I doing wrong??