Playing CPS3 games (6 in total) is kind of a miss/hit thing
You might think there's something wrong with the core, but the actual problem are the roms themselves.
I tried with many different CPS3 roms from various rom sources and none of them worked at all.
That's until I found a Youtube video with a MediaFire link containing cache files + roms + core
So, no... attemting to load CPS3 through Mame2003 won't solve the issue.
You just have to find the correct CPS3 roms.
Inb4: I could never make SF3 New Generation work, but Red Earth, Jojo's Venture, SF3: 2nd Impact and SF3: Third Strike works fine.