It's a command line script written by a fellow on the SlimDevices forum that allows you to configure a SqueezeBox Receiver (SBR) without having the SqueezeBox Controller from the Duet system. Most of the configuration has to do with network setup. You also need to download a Perl runtime environment from ActiveState (free) , similar to downloading a Java environment. Details can be found
here and
here. To download the script, look for a link in the middle of the page, about 2/3 of the way down titled "Zipped Archive" on this
page.
Robin was turning this into a SC plugin but that hasn't happened yet, so you do need to be a bit computer/network savvy to go this route, but it is supposed to work pretty well, I'll find out tonight or tomorrow

I think the simplest setup is to use the SBR
wired on a network with a router configured for DHCP. In that case, I believe the commands under "Receiver Setup Procedure" near the bottom of Robin's page are all you should need. From there you should be able to control it through Squeeze Center by any existing means.