So, I found this:

http://www.tesnexus.com/downloads/file.php?id=5701 which is quite old

And this:

http://planetelderscrolls.gamespy.com/View.php?view=OblivionMods.Detail&id=230

Which isn't very new either.

I used the first one in the past, and had no problems with it, but I wasn't using FCOM then. Will my game blow up if I try to run them together? Especially since FCOM comes with a bunch of changes to weapons and other things, not to mention the billions of scripts that come with it.

They should both work without issues. Neither actually alters the stats of any weapons (but might change the Finger of the Mountain spell), they simply swap the one you have for the next version.

Thanks for the reply I didn't want to have to avoid some quests just so I can do them when I'm level 25 or over

Try this: http://www.tesnexus.com/downloads/file.php?id=13536
It's newer but I don't know how it would work with FCOM.

Quest Award Leveler works fine with FCOM. You can bypass OOO's changed leveling of the Sigil Stones with it, though. Also, you should use http://www.tesnexus.com/downloads/file.php?id=13536, which comes with Raziel23x's fixes.

Thank you! I don't use Battlehorn (I don't THINK I even have it) but I do use KOTN, so yeah