Rebuild Imac

I have an Imac currently running mac osx 10.6.3 which i would like to rebuild and run bootcamp. The imac has no recovery partition and no cd rom drive. I dont mind purchasing a new copy of operating system. is there some soft of option to boot to USB and install from there?
the Imac model is 7.1
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Your cheapest solution is to buy and download 10.7 Lion for $30. When you run the download it will automatically create a recovery partition and you can install boot camp from there.

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BA-IT-2000Author Commented:
do i download this from itunes or via safari? sorry for the noob questions :(
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If your Mac is new enough you can go straight to OS 10.8 Mountain Lion following the instructions here:
Tim LapinComputer Consultant (Desktop analyst)Commented:
I would also put a copy of the installer on a bootable USB key.  Lion and Mountain Lion each need about 5 GB for the task.  That way you are covered even in the case of a crashed or dead drive.

Instructions for Lion can be found here.

The instructions are essentially the same for Mountain Lion.  The link for ML is in fact at the bottom of the page.
BA-IT-2000Author Commented:
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