[opensuse-autoinstall] SLES11 SP1 problems

I'm attempting to build an AutoYaST install for SLES11 SP1 on x86_64, using the attached file. I've run into several things that are stumping me: 1) It claims to not validate because of the write_hostname element. This element is in the RelaxNG compact syntax files (rnc/*.rnc) but not in the regular RelaxNG files (rng/*.rng). Is it valid? 2) The add-on is not working. It works fine if I manually add it via the URL, but putting in the file results in it not being used. 3) I cannot figure out how to disable kdump. Is there a way? 4) Is there a setting in the XML to disable IPv6? Thanks, Peter