Shiral,
The limit is 580kb of memory. You can keep copying and pasting styles into the user memory or record your own original styles or copy different parts of styles into the user memory. I know that many standard midi file songs are in the 50 to 60kb range and I would think that a style would be much smaller than a song. There is no delay in time when choosing a user style. If you want to play a style directly from a disk it takes about 4 to 5 seconds before it loads and begins playing. You can load a style while playing another so there is no pause in your ability to play music. The screen shows now loading while the new style is getting ready to play from disk.
George Kaye
Kaye's Music Scene
Reseda, California