Disposable Heroes - Pretty badass song. Has never been one of my favorites from the album, but that is mostly due to the overall amazingness the album has. Still, the song doesn't really have any weak points, and it has gotten the "classic"-status for a reason.
My Friend of Misery - It's okay. Personally I find the black album to be rather mediocre, and while I can enjoy a few songs on it, it really bothered me how they.. sold out pretty much. I'm all for trying new stuff, and that is probably why I really enjoy Load, but Black Album for me was a watered down Metallica sound, catered for the mainstream. This song isn't anything special for me.
Metal Militia - Hard to say. Has been a while since I heard Kill 'Em All, but this song to me was one of the more forgettable songs from what I can remember.
The Memory Remains - A decent song. The middle-section works well live, but the vocals on the studio version are fairly cringe worthy and bad, I think it's a solid/good song, but the fact that it's one of the hits on ReLoad speaks for itself.