i think i know of the game, pretty sure it was a NE who was hiding stuff.
don't know of the map twilight ruins so makes me think we're either thinking of diff replays or that i don't know maps or that it's not that map.
But yes, sounds quite familiar, had it ages back but dont think i have it any more. i do remember having a FFA replay pack or something on my other comp, i'll dig it up and see whats there within a week.
Hopefully someone else will find it before then to save me the bother.