crossdomain.xml is the default policy file. You can use a file under a different name like so.
Code:
System.security.loadPolicyFile("http://www.site.com/policy.xml");
I've got a legit copy of Flash CS3, I just dislike that thing in my background without knowing what it's monitoring exactly. I've been kinda high strung about what runs in my background though. Since I found out what gameguard (a 3rd party game protection software bundled with many MMORPGs) monitored exactly. It's a irremovable rootkit to boot. I stopped playing all games with gameguard. I don't use any product that has some 3rd party application or anything that can't be monitored by myself, run in my background.