Hi.
Myself I used Cakewalk & Powertrack Pro to made my own Midilyrics files it work perfectly for My Roland G1000 Yamaha PSR9K and PSR740 too.
Any way if you download Kar files it wont work with your Keyboard so you need to convert it to midifile (Type 0){I used Powertrack to convert Karfile to midi0file}
Any question email direct to me at:
Hoangtulq@yahoo.com
Best regard
Nikon