These are libraries for using USRP 
(http://www.ettus.com) with Winrad (http://www.winrad.org) 
and Skimmer Server (http://www.dxatlas.com/SkimServer).
It is based on GNU Radio (http://gnuradio.org/trac) drivers for USRP.
Their source code was been adapted for compiling by Visual C++ 2005.

The installation must be done manually - I did not expect such number of candidates 
that would outweigh my laziness to create the installation program ;-)
It is therefore necessary to perform these steps:

1. 
Unpack file <UsrpDrv.zip> into separated directory. This is standard libusb drivers 
(http://www.libusb.org) with inf file for USRP.
Then connect USRP to PC and power up it. Window appears to add a new device.
Select the manual search for drivers and enter the path to directory with it.
The new device will be named "USRP filter".

2. 
Unpack file <UsrpFw.zip> to the root directory of disk, on whitch is installed Winrad and Skimmer.
Typically you will create the directories C:\usrp\rev2 a C:\usrp\rev4.
This directories contains firmware for different revisions of USB2 interface chip, the Cypress FX2, and FPGA.

3. 
Run <vcredist_x86.exe> with right version of C runtime libraries.

4. 
For using USRP with Winrad, you must copy file <ExtIO_USRP.dll> into Winrad directory. 
Typically c:\Program Files\Winrad.
Then you can start Winrad and in menu "Show options/Select input" select "USRP".
For first start window reappears to add a new device again. Instal it like in point 1.

5. 
For using USRP with Skimmer server you must install Intel Integrated Primitives library.
Unpack file <IPP51.zip> into separated directory and run setup.exe in it.
Then copy file <CWS_USRP.dll> into Skimmer server directory.
Typically c:\Program Files\Afreet\SkimSrv.
Then you can start Skimmer server and select USRP device from combo on tab "Skimmer".
For first start window reappears to add a new device again. Instal it like in point 1.

Finally note - USRP acts as two different devices. 
One after first power up - without firmware. 
And second after uploading firmware by one of the libraries.
As a result, after first power up library reports error. 
You must restart application and then everything was fine :-)

If someone was interested about the source code of this libraries, 
there are available from author on PetrParyzek@seznam.cz

Enjoy It !