Where to get the assets?

[Tzajof]

Just about this: I've finally (after almost 3 hours of the last while sorting out the project in VS2010 and organising everything and so on) gotten a build working. Currently it's produdcing a FATAL ERROR of "unable to load PointLight2D"- I'm guessing this one of the textures from the game. So just to check, do I need a full installation of Overture on my computer to run Penumbra.exe properly?

It's just that I haven't installed any of the Penumbra games since I reformatted a while back, and I'd rather double-check before starting up the download on Steam. But it would make plenty of sense though.