I have an RC8025-ADT as well. It seems like ADT wiped the admin UI.

The CGI API is still there, however, and it's the same as the RC8230. See the appendix in the manual: http://www.eyespy247.com/site_media/support_docs/support_35.pdf

Basically to configure the wireless:

http:///set_group.cgi?group=WIRELESS&wpa_ascii= // (if you're using WPA. check out /get_group.cgi for the list of options)
http:///set_group.cgi?group=WIRELESS&wlan_essid=