"Win4Lin, a maker of Windows-on-Linux virtualization software, Thursday released Win4Lin Pro 2.0, which includes support for both older 16-bit code and newer 64-bit processors, among other updates. The new release also boasts easier installation, enhanced performance, and "compatibility with virtually all Windows XP/2000 business applications."
"The company announced last May that Win4Lin Pro v1.0 had been designated 'Red Hat Ready' for Red Hat Enterprise Linux 4 on x86 and 64-bit processors..."