no "aliens" on the EA version as yet, maybe in V1 (when I say aliens I mean those green things from the planet ZARG, theres still plenty of colourful characters in FPSC!).
I'm not too sure about using the 3d gamemaker models in FPSCreator, I think you will be able to use them in it if its freeware because you have already purchased both products. I'm not too sure what you would have to do about file conversion or rigging though...
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