Thanks. The removal of the ad answered my question.
The product does not support either Windows XP or Windows NT, according to the product overview. That would seem to limit its appeal to its target market, corporate IT managers.
Win4Lin Pro is the flagship product of the Win4Lin product family. Using Win4Lins high performance virtual computing environment (VCE),
Win4Lin Pro runs virtually any Windows 2000 or Windows XP application as intended, without the need to patch the host operating system (e.g. no need to patch the Linux kernel). This next generation product is the perfect solution for the technical workstation, home, or enterprise Linux user. Organizations wishing to migrate to Linux need wait no longer because they can now run those Windows legacy business applications that until now have prevented them from moving forward.