Just a quick heads-up in case this affects anyone else besides me. I have a scripted deployment for Windows 2000 servers. It operates doing a PXE boot in DOS mode, copies the install files from the depot and runs the install. All worked well, until I moved the depot to a 64-bit Windows machine. It turns out, the DOS mode network client doesn't seem to play nicely with 64 bit Windows. In this document, Microsoft says:
Q. Are there any features in the 32-bit versions of Windows that are not in Windows Server 2003 x64 editions? A. A small number of features are not included in x64 Windows, including DOS, POSIX, 16-bit support, and a few legacy networking protocols no longer in active use.