ferrari f355 challenge hd texture replacement

if anyone has actually kept up with my blog, or posts on some dreamcast sites, i have been for some time tinkering around with actual texutre replacement of dreamcast games. inspired by the popularity of sega bringing out their own hd versions of dc games, i have done my own attempts

http://youtu.be/YxonAM3Kfpc?hd=1
here is a video of a wip ferrari f355 challenge, (with choppy sound due to the running fraps on top of emulation)

Also interesting, its possible to replace non palleted sprites with 32bit colour sprites, see first pic.