Eric Santelices writes that he has modified the USR Universal modem connection script to reflect the new x2 codes and have posted them for download on his website. The scripts can also be used with ARA 2..x.
Update: Paul Lipps claims that there is a problem with the script. It does not initialize modem correctly. In short, the script sets &D2 and turns off hardware handshaking. He has a revised script (v. 2.3) which is now posted on Eric's site.