I don't want to discourage you from dumping games but unless there is some policy change in MAME for newer PC game to make them just use the CPU in people's PC on them directly like running a regular PC game instead of emulating the original game's CPU like every current game in MAME is done then this will never run in MAME in our lifetime. A "powerful" system in MAME is Naomi, it ran at 200 Mhz originally and is dog slow on high end computers in emulation. That P4 system was probably ~2.5 Ghz.