I had the same problem with the Config_X86_XMFXCHG parameter during the installation process. After a check on google, it appears this paramater is not valid on i386 architecture.
The solution is to install ubuntu i686 kernel, boot on it, and uninstall i386 kernel (for space saving). This kernel is optimized for Pentium II, III and IV. (For AMD, may be try dedicated kernel).
One another trick is to delete the first dripkg directory before compile the common package (first method).
Hope it helps.