I noticed that the gregtech terrain.png was pretty far outdated so I've started trying my hand at fixing it. None of the automatic versions of machines were in and a few other things were missing.
I've updated most of the textures for the machines but someone better at this than me might want to change it later. Either way, I'll try to have the rest of it up by tomorrow evening. But for now at least you can tell what you're looking at. I might try to do the guis later too.
View attachment 3620
Edit: Also, the latest update to the dropbox removed some stuff from railcraft.