Sunster,
You will find the first five disk at
www.psrtutorial.com . While the disks were designed use with the PSR-2000, they will also work with other keyboards. If you wish to use them, however, with the 740, you must first remove the OTS settings to prevent keyboard lockup. There is a program available, created by Jorgen Sorrenson, called NO OTS available that will do this automatically.
Enjoy,
Gary
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)