Here's what I'm trying to do. A while ago, I downloaded an nmap3.50 .dmg and ran the installer which installed one or more files somewhere. I know the binary was installed in /usr/local/bin but were there other files also installed somewhere else? A package management system is supposed to keep track of all that and will allow you to remove all installed files easily. For example, in Solaris, you use "pkgadd" to install a package. When you want to get rid of it, you run "pkgrm" and it deletes every single installed file that the package originally installed plus it does other cool things like make sure there are no other packages that are dependant on the one you're trying to delete.