Nice find on Smashing drive. I now ask about Rolling Extreme's status. I heard the game was dumped but not added to mame yet.
Just a quick reminder, some confuse Rolling Extreme's hardware to run on that custom Gaelco SH-4/PowerVR based hardware. It doesn't run on that hardware. The hardware it runs on is similar to Radikal Bikers but with two tms32082 dsps. Last report on this game in mame was back in 2013.
Hope someone still has this game dumped to add in mame.