Just installed Win7 64-bit and screwed up the partitions...

Hi, I just got rid of Win7 32 bit and installed 64 bit, but I screwed up the partition when I was doing the clean install. Right now I have:
Disk 0 74.5GB Online
System Reserved is at 100MB
(C:) 14.9 GB
Unallocated 59.5 GB

Is there a way that I can remove the partitions all together? I am in the Disk Management in Admin Tools, but unsure of what to do at this point. Any help is greatly appreciated......
 
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