I believe there is a HG-SS save backup tool that was created by somebody that works via wi-fi and FTP that works for infrared save files such as heartgold, soulsilver and pokemon black/white. Also, I would recommend a program called Poketemp found here, it is basically a smaller pokesav for black and white which is fully english, including pokemon names:
http://www.mediafire.com/?2zrvo1z2pjof1lp
For the Liberty Pass and Pansage mystery gifts I suggest not using the ar code as I believe they are in Japanese and not English. I recommend either using the Pokemon Black and White mystery gift file editor or a Pokesav which can insert the English card into your game, I would recommend downloading the pgt and inserting it that way.