Is there a way to specify an IP range in an ACL. What if I want to allow access for range of IPs that aren't necessarily going to fit perfectly with a subnet mask?

I have a vpn set up on my PIX with two vpngroups - one for my wireless employees and one for my wireless visitors. I have a visitor account set up in my radius server that is used for authentication to the visitor group. Both groups are set for aut...