Each time you hit Play, the RTs will regenerate unless Frozen. There is a checkbox in RT Prefs to 'Speed up generation of RTs'. I don't know what the default is but if you have a reasonable fast machine, this really helps. I have a 2 year old laptop and the songs begin within a few seconds with 2 RTs. It works by generating the RTs in the background while the song is playing.

I assume that if you decompress the RT WMA files to WAV, that will help a little but not nearly as much as the Speed up generation option I mentioned.

R