There's been a flurry of activity regarding that hack, for anyone who hasn't given it a gander yet. ponlork tweaked the engine to allow for more accurate postering with dunks, plus he's working on speeding up inbounding. Current players now include most (if not all) the current year All Stars, plus representation on each playoff team. It's quickly becoming a must see.
Meanwhile, I dropped a few PSX hacks myself to give back a little arcade feel to the 90s game...
"Just Jordan" Add:
http://www.romhacking.net/hacks/5911/Double Z Mod, with custom music:
http://www.romhacking.net/hacks/5944/Lite Version (no custom music):
http://www.romhacking.net/hacks/5975/Double Z Mod for Japanese rom, with custom music:
http://www.romhacking.net/hacks/5974/Lite Version (no custom music):
http://www.romhacking.net/hacks/5977/Enjoy!