If the game runs slowly, go to Emulation Settings > Speedhacks and enable “MTVU (Multi-Threaded VU1)”. This drastically improves performance on CPUs with 4+ cores.
A: No. Highly compressed files are for emulators only. You cannot burn a compressed archive to a DVD and play it on a real PS2—the console requires an unmounteded, unfiltered ISO. And even then, you would need a modchip or FreeMCBoot to run burned discs. god of war 2 highly compressed ps2 iso