great!! some time ago i tried to make a gb game on my own (in fact, i tried it four times on three engines ). i never finished any of them - but now there's realspawn!
please tell me if you need help in any way, i won't make it into the main team cause i don't have enough time, but i could support you with level- or modeldesign, 2d-art, scripting, music or sound-fx (i'm pretty good at all ).
legally we dont need any licence since its a non profit fan game as stated on the website. However some friends i met at the ghostbusters forum made like a very simple GB demo and asked permison to sony to sell and they got it
so i am thinking if this turns out real cool to send the demo to them.
my dog resembles it 
!
). i never finished any of them - but now there's realspawn!
). 
