Issues installing leopard

So I currently have windows loaded on one of my hard drives. I bought a new one so that I could install leopard on it, cause I would like to develop iPhone apps. Is this possible? I have the boot priority set up to boot cdroms, then my new hard drive, then my old hard drive (loaded with xp). I tried pressing the 'c' button upon booting, and it just bypassed the first hard drive and loaded the hard drive with windows on it. I'm not sure if there's anything more I need to do before I can load leopard onto the new drive. I don't think it's an issue with the cd rom drive: it has dual-layer reading capabilities.

I'm really not sure how to approach this. any ideas?

thanks,
nick