BFG in Hell

I am looking for the BFG in hell. I have been told there are a couple of them. The first being on a ledge, I have looked and looked. I am stupid. I need someone to be much more specific in telling me EXACTLT where these BFGs are in hell. Thank you

Ehh, I can't really explain too well where the first one is, but there's another one I can better explain:

There's one behind the "demon teleporter" (pillar of green light y'know) that leads to the Guardian - there just narrow your way past the green beam and there are a few rocks you need to jump around on.

Yeah, the one on the ledge is hidden from view in shadow, on one of those little rock precipes that has BFG ammo on it.....behind a couple rocks is a small drop-off with the gun on it.

Heh, not to get lambasted for this (hopefully)... but Doomworld isn't the premier Doom 3 site... http://www.planetdoom.com/doom3/walkthrough/hell.shtml Planet Doom has a good walkthrough for this.

It's the premier Doom 3 site and still it doesn't have a list of secrets :-/