A Virtual Machine is just that, a virtual computer running on your computer. Check out VMWare Player and download a virtual machine like Ubuntu to play with. Microsoft also has VirtualPC for the same type of purpose. As for having charts open, more than one person can have a chart open. One person can only have one chart at a time open though. So say you open John Smith's chart, then you want to go into Jane Doe's chart, you need to close the first in order to open the second. Our office has not had issues with this and we have 5 providers and about 25 office employees. When they need to edit a different chart without losing the information they have put into the first chart, they simply forward the first one to their own inbox. It is really an easy thing to do and does not come up for us very often.
