I want to make some flat objects I can place around floors to break them up and I can't find the blood splatter objects to base them off of - does anyone know where they are located inside the meshes folder?

IIRC they are in Meshes\effects\Impacteffects\

Hmm. I don't see any static decals just impact effects.

There are broken floor statics that you can use for this purpose.

Well I found some sawdust and hayscater. I guess that'll do.

Bloodsplatters and other decals are TextureSets, and you can drag'n'drop them into the 3d view for positioning, it's pretty cool.