That seems to be the project everyone wants to do lately when starting out. I've even started working on my own version in my free time, which I never seem to have. There are a ton of tutorials and walk thru's. Here is one that I posted on HauntersDigest.com - http://www.hauntersdigest.com/tutori...nt1000-did-it/
There are also this one that I will be adding to the tutorials area - http://www.halloweenforum.com/tutori...nic-raven.html
Hope that helps and good luck with your raven!