Need more information! Is the metal "key" actually in two pieces, or has the metal key become disengaged from the Plastic ?? THERE IS A LOT MORE TO THE fob THAN THE METAL KEY TO START YOUR CAR!!!!
Do you have two keys? It is easy to dig a really deep hole if you do not know what you are doing in respect to the FOB. You need to read this before going any farther: Key Fob info

Here is another link to many fixes for the Crossfire that has been compiled by Onehundred80 over the years; after clicking the Link scroll down the page and find the subject "Fob Repairs" Index of Crossfire Repairs