I recently bought the latest version of SR2000 from CJE. It works on my RO4/SA RiscPC but not Aemulor yet - hopefully soon. It's great playing it again, not been able to since getting SA years ago. I would love to see a improved version created. It looks like vector graphics to me so it would be great for the graphics to be improved to be resolution independant or at least 640x480 in a true 256 colour mode. How about giving the CPU cars AI, the recorded route for each car could get a bit annoying when they could push you off the track but you couldn't touch them.
I remember playing 2 player split screen Killer on my A3000 - bit slow but great fun. Imagine 16 player Killer over the internet. Cool!