I don't really know how to do either, but I was wondering if it was possible to have multiple firewalls / virus scanners installed at once, and use a 3rd party program to specify which one is running at a time. Example, if someone were penetration testing or something of that nature, one firewalls / scanner might pick up things that others do not, and vice versa.
I think this would be a great idea, but I know that having multiple virus scanner at once can mess up a computer, and I would have no idea how to remove a service pack for an OS like Windows XP or Vista. Would this be possible at all, or would it just be easier to use a Virtual Machine? I just think it would be more practical to have a physical machine if you're at home messing around, but the virtual machine would look the same over the network if this is being done remotely. Any answers would be much appreciated!