So fairly recently the dude who teased the "first-person" mod he made many months back finally decided to make a tutorial on how to do it. It's nothing difficult: install Cheat Engine, run the lua script the dude made, and you're done. But you need to have version 1.08 of the PC version for it to work.
My problem is that Steam automatically downloads the update alongside the game (or can you change that?) So that doesn't work. And I can't find a torrent of that old version, either. Yet, for this mod and for a few others, you're asked to use the "un-patched" version of the game. I've searched Google up and down, using all kinds of search terms, and can't find out how the heck they're doing it, which leads me to believe it's incredibly easy and I'm just missing something.
So, what am I missing? How do I get an un-patched version of the game? How stupid am I?
edit: I should also say that this wouldn't allow for disruption of the online community, because it'd be on a different version. And I only mention the torrent because I've obviously already bought the game on Steam (have it on PS3, too).