Updating installation

I've been trying to autoinstall from the 9.1 DVD for a while now, but I've given up on this due to all the bugs I've run into. In an attempt to have more control over the source, I've decided to set up and installation server instead so that I may update all the stuff that's missing in the .dtd files etc. My question is if someone out there has updated .dtd files that works with most of the xml code yast2 generates, or do I have to figure out what's missing myself? Regards, Harald