How do you get the Altair Costume in Metal Gear Solid 4?

I want to get the Altair costume really bad! How do you get it?
I know that you can enter: aottrykmyn in the code section but I cant seem to find it... Where is it?

put in this code in the password section:

aottrykmyn

How To Get Altair Costume on MGS 4

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