RFID: RC522

Hello!
Today I received a RFID-RC522 reader/writer from eBay. I have been googling for a few hours now and I've found satifactory code for reading both ID and other data of the cards/keychains. However I haven't found anything covering how to write to a card.

Has anyone used this module before for both writing and reading?

Any help with this is greatly appriciated!

Thanks, Kalveo.

I'm just waiting for mine to arrive, could you post a link to the code you found?

thanks!