It depends I would think.
Are you running 2 dedicated servers from the same folder? Or are they seperated.
If they're running from the same folder, then I think the VCE_saveVariable and VCE_loadVariable would both read and write to the same file on both servers. Otherwise you'd probbaly have to use a 3rd-party script to do that.
On Linux you'd just do a symbolic link and call it a day, but I'm not sure about Windows.