Q 224: Recently there was a discussion about a first level wizard getting Fell Draining Sonic Snaps and Fell Draining Magic Missiles via being Specialized in Evocation, and taking the Fell Drain and Metamagic Spell Focus (Comp Mage). A first level wizard couldn't make the Fell Drain Magic Missiles via only the above, but that's beside the point.
I think there was also a method mentioned with the same set up, but using Sanctum Spell rather than Metamagic Spell Focus. I'm not seeing how that works, though. As far as I can tell, the best you could do is have a first level slot (with a magic missile) that counts as a second level slot/spell for DC's, counting as casting second level spells for PrC's, etc. But that doesn't create a way for you to apply higher slot-cost metamagic, does it?
Due to the lack of necessary skill ranks, the setup doesn't work (can't take Metamagic School Focus at first level).
Don't have access to my books at the moment, but I don't recall there being any skill requirements for Metamagic School Focus. The only requirement was having Spell Focus in the school in question, or being a specialist wizard in the school in question.
I think you are thinking of a different feat. Metamagic School Focus has no skill prerequisites, only either Spell Focus or being a specialist wizard.