Again, I didn't make the voxel. It was made my "Me2". I got it from e-source before it closed down. And it's in Allied colors (come on, it's an American helicopter),
but I have discovered a method which will easily fix that. (That tutorial is the one thing I have really contributed to the community; it may as well get some use).
Here it is, on YRArg:
http://yrarg.cncguild.net/downloads/voxels/uh60.zip
I personally like it better than the Nighthawk, but that's partly because it's based off of a real vehicle. It's a little too large, but that can be fixed easily by editing the header.
EDIT: I found the Chinook voxel. It's in Soviet colors, and the color sceme is a little crappy, but the model is pretty good. I personally like this thing. There are a few other good voxels here, too.
http://members.aol.com/redalerttwo/contest.htm