No, for both.
I ran into Corpse Killer while attempting to find the game on my own, but that isn't it.
As for this Doom mod, I never heard of it, but seeing a few screenshots I'm positive it isn't the one either.
However, I'm still bleeding trying to find the game... it probably wasn't too successful when being so hard to find
But what did I know of quality as a 10-year old anyway...
Thanks for the replies, though.