Since no one answered, I kept digging around and found this:

If you use the WPA2-Personal, you should use a password generator that will generate a 63 character password. Once you have changed the security setting on your router to WPA2-Personal, right click on your wireless network connection, go to "Properties", choose the new security setting WPA2-Personal, then enter your password twice in the fields. I found that putting the password in a notepad file and then copying and pasting it made it much easier. Even when the computer is rebooted, there is no need to re-enter the password.

We were able to set up all computers with one problem: on one computer Internet Explorer 7 wouldn't work. We found that there is a hotfix for Internet Explorer 7 that allows it to work with WPA2. You can get the hot fix here:
PC World - PC World Downloads - Windows XP WPA2 Hot Fix KB893357