i swapped my emblems from the gold package to black pearl.
i used this 3M adhesive, paid around 4$ for it at Walmart.
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this stuff works really well it has the same consistency as rubber cement glue + its easy to work with. use rubber gloves w/ this stuff cause its a pain to get off your skin.
before you put the new ones on make sure the paint surface is good & clean, hold the emblem on the car and protect the surrounding area w/ tape. this way if you use an adhesive and it drips/runs some it won't get on the paint around the emblem, just the tape.
you won't need to cover the entire back of the emblems with this, just put a few dabs/drops of it and your good to go. oh and work on one piece at a time you should only have apply pressure to each emblem for a couple of minutes till it bonds.
good luck