Hi all
One of my readers has recently contributed an OpenVPN guide to my WL-HDD wiki at http://www.sprayfly.com/wiki
The guide goes into a great depth of detail, both in installing the server on the WL-HDD/WL500g to installing and setting up the client on the windows XP computer. Furthermore, all the key and certificate generation is also covered. I have tested the guide fully and have a fully working setup. I have also made some modifications to make it more user friendly. Feel free to have a look and try it out at http://www.sprayfly.com/wiki/OpenVPN

All credit for this guide goes to Propa. Thanks!!!