I'm an organ donor, because I intend to be cremated in any case. It doesn't matter whether the body will be "intact" or not.
I'm with Linda on this one. Use whatever you can and dispose of the rest. Cremation is my choice as well, but if you want to toss my carcass out to feed some turkey-buzzards, that's okay. Just don't do it in front of my kids.
Other than that, I'm dead...I won't mind.