Alright, I got GTA IV installed, but I haven't tested it yet. Expect me ingame in about 2 days, ruling over you in the game.
If unsuccessful, I will report here.
In the settings though, it was quite laggy. The loading screen was quite fast though, but that happened on my old laptop which ran the game at 5/6 fps.
I MIGHT not be able to play it just yet due to lag from the computer I'm using for it, and if so, I will try it on the desktop I'm saving up for.