I can recommend WordStat/Simstat from Provalis Research. Another possibility for this, although I am not sure, might be VBPro, a free program that runs under DOS.
Jane E. Robbins, M.A. Ph.D.
Department of Leadership, Policy, and Organizations
Vanderbilt University
Peabody #414, 230 Appleton Place
Nashville, TN 37203-5721
tel 615-343-7123l; 615-322-8000 (department)
fax 615-343-7094
jane.robbins@vanderbilt.edu