Windows bootloader although no Windows partition?

I wanted to install Windows XP on my iMac so I could run those Windows programs I run into once and a while. Anyways something happened on the Windows side of the install so I decided to just boot back into Snow Leopard and erase the Windows partition. That's exactly what I did. I erased the partition then added the extra space back to my Snow Leopard partition.
Now whenever I turn on my computer it starts the Windows bootloader and says like "No install found" or something like that. I can get around it by holding the option(alt) key on the keyboard and then selecting the only option which is Mac HDD, it then boots into Snow Leopard. But it gets annoying having to do that every time. Any way to fix this?
Thanks

You didn't follow (or read:) the guide you are presented with in BC Assistant.
Boot from OS X DVD now and try to use "-" on that 2nd partition, repair, and then extended primary partition. Then use Disk Repair.
That isn't the way to remove a Windows partition. May not work.
And of course have backups.
http://www.apple.com/support/bootcamp - links to tech articles, guide, how tos

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