obviously 030+ makes no difference to 99% to WHDload games more games like Doom, for WHDoad extra Ram helps infact theres ways of running WHDload Slave's on 2mb machines now but still beta - and you might find upgrading to kick 3.1 introduces a bug where over 4mb you cant use the pcmcia slot and OS3.5+ can be run on kick 3.0 with software patching. try google if you need more info.
