Thank you for sharing this.
Unforunately, I tried it on OS X 10.9.4 and it isn't working. When attempting to launch the Wireless Network Utility I see the following error in the console application:
8/26/14 8:51:28.473 PM com.apple.preference.network.remoteservice[275]: *** WARNING: -[NSImage compositeToPoint:fromRect:operation:fraction:] is deprecated in MacOSX 10.8 and later. Please use -[NSImage drawAtPoint:fromRect:operation:fraction:] instead.
On the other hand, if i attempt to use the latest 8188cus driver from Realtek's website Wlan_11n_USB_MacOS10.8_Driver_UI_2.0.1 it fails with that error in addition to a continuous error about the driver itself:
8/26/14 8:23:05.763 PM Wireless Network Utility[239]: Model -ioClassRef error
So it seems the older version provided by seargant may be working for 10.9.4 but since the Wireless Network Utility fails with the aforementioned error, I dont know of a way to control it. Any input from the advanced users would be greatly appreciated!