Michael, in general is correct in his assessment of acquiring and installing third party instruments. When you install such instruments you need to do this response/challenge stuff. Now, it may be possible to do this on your computer first and then transfer the wave files to another computer or keyboard....I have my doubts. One could enquire about such things with some of the developers. Most of them are very helpful, e.g., Bardstown, VRSound and others.

The other thing is that it is not just a matter of moving the Wave files. You would need to tie them altogether into a virtual instrument. Sometimes you can use conversion software such as Awave or CDXtract to accomplish this. The thing is not to give up to soon. There are some very very very good sounding instruments out there.....much much much better than what you will find in a Tyros or Motif, etc......

The other thing is that many of these instruments are very large in size, e.g., Bardstown's Bosendorfer 290 weighs in at around 2.3 GBs. There are newer versions that are very good and much smaller in size, e.g., Garritan's Jazz & Big Band Library.