Hi There!
I dont use the style file much, by instead use the midi backings. I either create them, or just download from the internet. It might be an idea to search the internet for a midi file.
Try my site below: Use the first search engine. Type in the name of the song and press "SEARCH". Once you have found the midi file - save to a floppy disk and play in your PSR. Easy as 1-2-3!
http://c-mat.com.au/search/ I hope that this is of some help.
Have fun!
Brad.