From our very own Synthzone
http://www.synthzone.com/softsyn.htm
http://www.synthzone.com/cubase.htm

There are 3 main options to usingVSTs

1. A Computer and controller Keyboard/Arranger
2. A Hardware Unit and controller keyboard/ Arranger
3. An Arranger Board that has the computer inbuilt. (So that you only need to carry 1 item around)

All the above types are used by various members, so just post any questions in the General Arranger and/or the Softsynth Forums.
Hope this helps

Bill