BTW, I thought I would mention for those interested:
Taito Legends 1 - The game emulates the music or streams the music into RAM - you can open the disc and the music is still playing, the entire game is loaded into RAM.
Taito Legends 2 - The music streams from the disc if you open the disc tray the music stops. Most games are loaded into the memory (except for the music) but some games aren't loaded all the way (obviously the loading issue is just for the CD games that were based on the PS1 system like RayForce, G-Darius).
EDIT: Rastan 1 is definitely great, but 2 is definitely better.