I recommend you try giving your AI an open ended task like, "it's at 4 fps even though it's a 22 year old game and the raw hardware performance is many orders of magnitude higher. Maybe due to running under Wine and Rosetta. Please figure out the simplest way you can unlock usable performance (30-60 FPS) short of decompiling, reverse engineering, and reimplementing the full game yourself natively. Maybe there is something else you can figure out for the performance unlock. The hardware is definitely there, so there has to be a way. The game is running so make sure you don't break it. Keep the same game behavior."
Regardless of which AI you're using, it will be able to figure something out in a few hours. 2004 pc's were 500-800 mhz, 128 MB RAM, and if they had a GPU at all it was 16-32 MB, 0.2-1 GLOP.
Your AI should be able to figure out a way to get it running in realtime.