I can't help you with 'Inveterate In Nomine' but I can help you a bit with crossovers. It might be known as the Pit of Voles but fanfiction.net does have some good authors. Read;

Vathara; http://www.fanfiction.net/u/77482/

She write /really/ good crossover fanfics. I'd recomed reading her stargate/gundam wing crossover. You don't even need to know that much about either fandom because Vathara write her fics in such a way that it is 100% comprehensible. Honest.

(And I'm entirely obsessed about her YGO crossover fics -_-;;)