I'm surprised that it gives you problems in installing to HD, but maybe something I removed is affecting the installation. Another issue is whether the clustering will work properly after a HD installation. I doubt that it will, since I think the ssh keys are re-generated during a HD install. The clustering you can get using the CD depends upon each node knowing the public key of each other node. That will break, I expect. At any rate, I haven't used ParallelKnoppix for a HD install, and I don't recommend it since you would have security issues if it worked. Cheers, M.