Ok, the very first thing you need to do is configure the system for another workstation.
1) Open POS Configurator and go to the Devices tab.
2) Click on Network Node
You'll find a list of all of your workstation, all of your network printers, your server, and any KDS you might have. This is where you define the device type (Win32, Workstation4, mTablet, etc) as well as the networking settings.
a) Click on the last workstation in your list, in this case UWS5. You only have four workstations, but you have five configured. This is pretty convenient. Verify that an IP Address and Subnet Mask are configured for UWS5. Once you have verified that, in the Workstation Type dropdown, change it to Workstation, probably from Workstation4. Workstation is what Micros calls the Win32 workstation type while Workstation4 is the WinCE type.
b) Click the green check box to save the change you made, and click the Update Host File button
3) Close that window, and now click on Devices.
This list pairs a network node with a device name; for workstations there really isn't anything to do here. If the UWS5 doesn't exist in this list, click the blue + button to add a new record. We only have to deal with the first tab: Set Device Type to User Workstation and Network Node to UWS5.
4) Close this window, and now click on User Workstations
This is where most of the actual configuration for the workstation takes place. Hopefully this also has a fifth workstation configured already. If not, click on UWS4, and click the blue + button.
a) In the device name column, click and a dropdown will open. Select UWS5.
The rest is a bit more tricky; you're going to have to jump back and forth between UWS5 and UWS4 so that you can mirror the settings for all the tabs.
Once you've done all of that (and hopefully you won't have to because you have a UWS5 already setup), you can install the actual CAL software on the computer. It has to be on the same network as the rest of the Micros computers.
Here is the only bit of software you actually have to isntall. Once you install it, CAL will launch. It will search for servers, and hopefully find yours. Once it does, either tap on the server (or if you didn't get a touchscreen click) on the server; make sure it fills in the fields using the servers information. Click next; you should now get a list of workstations; there should only be the one, UWS5. Click on it, make sure it fills in the settings in the window clicking again if it doesn't, and then click Next. This will automatically pull the necessary software down from the Micros server itself and self-configure the workstation. The computer will reboot quite a few times, so either set windows up so that it logs in automatically or be on hand to log back in every time it comes back up.
Sorry my instructions are a bit quick and not very detailed, but its Saturday and I'm watching a movie and replying on my pad

Let me know if you have a specific hang up and I'll try and help.