How to: Reformat my Macbook Pro 10.7.4

hey guys
i know this question has been asked alot but i cant seem to find an exact answer to my question. i have a macbook pro late 2008 with OS Lion install and im currently copying everything i want to save on an external harddrive, but cant seem to find find a way to reformat my MBP. i got lion of the app store and know that i cant just wipe de HD with Disk Utilities because i wont be able to reinstall OS Lion, on the net they keep talking about LION RECOVERY DISK ASSISTANCE but they say you need to have a recovery saved or somthing of the sort... isnt their just a simple CLICK TO REFORMAT BACK TO SCRATCH WITH OSX LION RE-INSTALLED?
thanks for your help.
Sean

You can format your Lion partition because you don't need it to download Lion again. Boot in recovery mode pressing Command and R keys, format the partition using Disk Utility (it's called Macintosh HD if you didn't modify it) and reinstall. Note that your computer will download Lion, so the process could be long. When you have installed it, you can restore a Time Machine backup (if you did one) or restore your files of your external drive manually if you didn't activate Time Machine

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