I mentioned above about Akai Samples, so here is a link. http://www.timespace.com/index1.asp?ID=prosamples just choose Akai S1000 in the format box to see what’s available.
As to VST instruments you can use, here are some links. http://www.native-instruments.com/index.php?id=products_us http://www.steinberg.net/149_1.html http://www.eastwestsamples.com/details.php?cd_index=961 http://www.musiclab.com/products/realgtr_info.htm

And remember the above can be loaded and played within the instrument, with no external hardware/computers required.
Enjoy whatever you play

Bill