How can I remove Vista dual boot?

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I recently installed Vista Home Premium 32-bit on my 74GB hard drive with a single full partition. A few weeks later when I got my Vista Home Premium 64-bit DVD, I used Vista to shrink my C: volume as much as I could (about 25GB), and created a new partition onto which I installed the 64-bit version. I have since found that all my programs and hardware work fine with the 64-bit version, so now I would like to delete the original partition containing the 32-bit version. My goal is to end up with only Vista 64-bit installed, and preferably have my entire 74GB drive as a single volume again. However, from what I have read, apparently the Vista boot loader is on the partition that I wish to delete (containing the first Vista installation).

If I just delete the volume with 32-bit while running 64-bit, will I have problems the next time I restart since the boot loader is gone, too?

Will booting from the 64-bit DVD restore the boot loader to the remaining Vista 64-bit installation?

Do I even need to worry about the boot loader with only a single OS installed?

Do I need to take any other steps?

Any other advice, suggestions, links?