Are the industrial and (whatever mod those ogres are in) mods compatible? How do I use mods in minecraft? Do I just download then drag into some folder and select them in the mods section in-game? If so, how do I select more then one?
Yes the industrial mod and the mo creatures mod are compatible.
Modding currently is a little complex, though both of those mods give detailed instructions in their forum posts. You will need an archiver program like winRAR that can open and modify .jar files.
Mo' Creatures mod.(birds, horses, sharks, dolphins, ogres, bears, lions, wolves, wraiths, mountable horses including flying Pegasus, and mountable dolphins) EDIT: Horse breeding, dolphin breeding...
IndustrialCraft(Bronze, refined iron, copper, tin, uranium, mining drill, chainsaw, batteries, generators(coal, hydro, geothermal, solar, nuclear), waterproof redstone(cables), mining laser, automated drill miner(works like an oil rig), industrial TNT, Nukes, composite alloy(refined iron bronze and tin), reinforced stone, reinforced glass, terraformer.... EDIT: And a practical use for lapiz lazuli!
Make sure you get the prereq mods listed in each mod's OP too. I think you need ModLoader v5 for both of them. They are mostly behind the scenes things that the mods need that you won't see running. But the mods won't run without them.