I upgraded directly to OS X Lion and now dont have a copy to do a clean install. What do i do?

I upgraded to Lion from Snow Leopard directly and didn't burn a copy of the installer. I want to do a clean install now. How do i do it?

You'll have to backup user file folders to a external drive (not TimeMachine), disconnect.
Go to the MacAppStore, log in and hold option key while clicking Purchases, supposedly you can redownload Lion installer which you can make a Lion boot DVD (of the complete OS) with.
(If not c boot off the 10.6.x disks and Disk Uitliy Erase/format your whole hard drive HFS+ journaled and quit, install 10.6.x and Software Update.)
Once it's downloaded you can make a couple of bootable DVDs here. (right click on the installer icon in the Dock and "show in finder")
http://www.eggfreckles.net/notes/burning-a-lion-boot-disc/
Now install Lion again fresh and you'll have both a new Lion machine and the hold c bootable disks.
Once your up on Lion, then transfer the CONTENTS of the User file folders back into their respective folders on your new configuration. If you use the same user and hard drive name as before, your iTunes playlists and song pathnames will be preserved.
If you don't want to make boot disks, then simply Command R boot Lion and the Lion Recovery Partition you can erase and reinstall Lion that way as it will download it from the Internet (slow and glitchy)
Having the Lion boot disks has it's advantages, as you can reinstall Lion on a new hard drive you replace as well as other machines without needing the Internet.

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