how to install windows 8 on a macbook air

a friend of mine purchased a macbook air and partitioned the hard drive so he could install windows 8 on the empty partition.  However windows 8 installation  says it cannot install on that partition because it is not formated as GPT.  How do we resolve this issue?
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Did he use the Mac Bootcamp installer? Is his Mac compatible with Windows 8?

Read these MS and Apple KB's:
David AndersTechnician Commented:
BootCamp step by step vs Virtual,2817,2344661,00.asp

BootCamp versions and Windows versions Chart

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beemmerAuthor Commented:
We got it running, thanks for your help.  we found that he should not have manually partitioned the hard drive first but should have let boot camp do it for him.  He went back and set the partition like it was at first and then let bootcamp do it's thing and then everything worked fine.  
Again, thanks for your help
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