Thanks for your comments. I have been downloading organs with about 20 stops but they don't fit in my 4GB of RAM yet the GO Demo organ does this in about 55MB of memory. Am I missing something?
I have moved to GO due to the 1.5gb constraints imposed by Hauptwerk. However, I now find I am limited to 4gb in my computer RAM. If it is not a silly question, is there a sample set, preferably more than to 2 manuals + pedal, which will fit in my memory space?