It wasn't much work to convince them at all.
The part about the Vail Renovations was originally thought to have it be a "stalker" who'd worked at the studio DT was at, sneaking about around the studio when they were making the record, changing some text here, hiding some code there. He would have the key as he was still working on stuff there...
But then you guys figured out where the studio actually was, and we quickly figured out it would be dumb to do that story as then we'd maybe get copycats

Can you imagine if some fan came running up to the studio? But the game was already designed at that point, so we didn't want to rework a lot of stuff.