Download the gerbers, and order from your favorite fab house. The board is double sided, plated through hole, silk screen on one side only. The board size is 50mmx40.62mm, with the minimum track/gap being 8mil.

Once the boards arrive, solder all the components onto the board. My personal method is to go according to height, starting with the smallest, however it is also good to check whether any pad will be difficult to get to if another component is soldered on first.

Download the ST Link Utility from here, and download the firmware file from the project files list.

Connect the J3 pins to either another ST-Link, or the ST-Link part of a discovery board. There are also ways to flash the firmware using other dev boards, and USB-UART modules, however I won't go into that here, there is ample info already out there.

Connect the mini usb of both the ST-Link, and this module to the PC.

On the ST-Link Utility software, open the downloaded firmware file. Then click Target, and Program/Verify.

Once the flashing is complete, disconnect both the mini usb cables.

Disconnect the programming wires.

Connect the mini usb to the PC. The module should come up as an ST-Link v2.

Then on the ST-Link Utility software, click ST-LINK, and click Firmware Update.  The version will appear, and also the software will show the latest version available. Click Yes.

After its completed flashing the latest version, congratulations, you now have an isolated ST-Link v2!!