Can I program a transponder on a 2004 Mazda 6 with a valet key?

[mazda6key]

As the title suggests, I just bought a spare key on ebay for my car. I saw that it is possible to program the transponder in the new key using two keys that are already programmed. My question is: can I use my normal key, then my valet key, to program the new blank key??? Otherwise I'm screwed and have to go to the dealer.


Thanks!