By default, Vista doesn't offer you those options. It gives you a single box in which to enter the passkey, and then does the necessary trickery to handshake with the router in the correct format.
I tried for a while to connect to the network in the "Connect to a Network" dialog, which doesn't allow for the security protocol to be specified, it just asks for the password. It does specify the protocol in the pop-up box if you over over the wireless signal dialog, so I was guessing it was correctly working. When that didn't work, I went into the 'Manually Create a Connection' to specify all the information, which includes the security protocol. I changed the security protocol on both the router and the laptop to see if I could find one that they liked.
This was all Vista's native networking tools. I'd have to dig around to see what the adapter's software is.
I'll take a look at what the NETSH WLAN SHOW DRIVERS gives me when I get home.