there is a FAQ and I give you some hints:
use Iori SPU
use joy0demo only if it works because has some issues in certain games
use the NT/win2k cdr native plugin if you can (on some SCSI CDrom fails so you have to use the almost perfect pete'sCDR through the wrapper)
use any recent Pete's/Lewpy's/Kazzuya's GPU through the wrapper (from the configurator select the wrapper and the presso configure and the select the plugin/configure it)
use Iori SPU
use joy0demo only if it works because has some issues in certain games
use the NT/win2k cdr native plugin if you can (on some SCSI CDrom fails so you have to use the almost perfect pete'sCDR through the wrapper)
use any recent Pete's/Lewpy's/Kazzuya's GPU through the wrapper (from the configurator select the wrapper and the presso configure and the select the plugin/configure it)