I'm not sure if this would work, but perhaps with the HCE you could change one of the skins/scenery to something like dirt particles. Once again, I'm not sure if theres a setting in HCE to do this. I'll post again once i've found out
i just checked, and there's no blood object in HCE. perhaps a beta tester for HCE will see this post and suggest it for v8... *wink *wink
EDIT: Besides, Halo has NO gore in it. I mean, Unreal Tournament has more, and that was allowed years ago. EVEN DOOM 2 has more blood than halo for crying out loud! The only time halo really has blood is when u stand by a dead elite and melee it till the xbox crashes from object overload