The type mismatch pointed out by Jay Belanger is fixed, as are a few lines of overlapping text in the contrib section of the manual. --Andy Andrew D. Hwang ahwang at mathcs dot holycross dot edu Department of Math and CS http://mathcs.holycross.edu/~ahwang College of the Holy Cross (508) 793-2458 (Office: 320 Swords) Worcester, MA, 01610-2395 (508) 793-3530 (fax)