I am playing around with the scan.pl program that Anthony Persaud wrote. I would like to be able to run two instances of nmap at the same time. I am trying to scan a port with one instance (OS detection) then with another instance scan (ping sweep) the next port to see it that port in up. Is this possible? I try to run one instance then when I call the next instance it overwrites the first scan. Thanks. -Chris Hecker