First, only NGK plugs are recommended for the Galant. While others might work fine, they're more likely to cause problems than the NGK's. You should only need NGK platinum plugs if you have a V6 because the service interval is longer than on an I-4.
As far as lining them up, your friend probably means setting the gap on the plugs. You should ALWAYS do this with new plugs, using a gap gauge and the factory specs. The gap is measured between the electrode (the thing in the middle) and the discharge post (the metal part over the electrode). This is critical to making the plugs fire correctly.
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