Hi everyone! I want to keep and install both ns-2.33(latest) and ns-2.1b6(old) in my vista machine under cygwin. Is it possible?? Will this make any malfunctioning to any of the ns-2 packages?? Regards, Nikhil _________________________________________________________________ Be the filmmaker you always wanted to be—learn how to burn a DVD with Windows®. http://clk.atdmt.com/MRT/go/108588797/direct/01/