I am very happy with GAlib, but it would be nice to have an example of customizing the replacement method in customizing chapter of the manual. Regards, Harald --- Harald H. Soleng, Dr. Philos. Senior Research Scientist Norwegian Computing Center Phone (direct): +47 2285 2671 Phone(central): +47 2285 2500 Fax (central): +47 2269 7660 http://www.nr.no/~soleng/