When you say "patches" do you mean the actual patches, i.e. v0.60 > v0.61 downloads, or are you referring to the different parts of the game, i.e. part 1, part 2, etc.?
See, the different parts you just unzip to their own folders. In fact, I'm pretty sure it would break the game if you just unzipped part 2 into your part 1 folder, and so on. But the actual patches you just unzip into the appropriate game part's folder. Note that you'll need to download and unzip each patch individually as well.
So if you're still on, say... v0.57 for part 4, you'll need to download v0.58, v0.59, etc. all the way to the current version, and unzip all of them in the correct order into your game folder. But at that point I'd personally recommend just re-downloading the whole game with the latest version instead. Much easier that way.
Whether or not that's information you might have any actual use for I wouldn't know, but I figured I'd mention it regardless. Just in case, ya know? Have fun either way, my man!
-Mal