To answer my own problem :)
Thanks to Svedrin on IRC the solution was found. I had to change a line at boot time.
This part:
root=live:CDLABEL=ovirt-node-image
Should be (at least for supermicro virtual USB cd users):
root=live:/dev/sr0
Now I was able to install the node, but needed to go back to the
ovirt-node-image-2.2.2-2.2.fc16.iso one because the 2.2.3 gave me a lot of errors.
Thnx for the help,
Michel