The SnapOS is not compatiable with Vista. I would suggest you read the FAQ's and a thread the reported problems and possiable work a rounds. Both should be stickys.
http://forums.procooling.com/vbb/showthread.php?t=13863
The FAQ's are linked in my signature.
Nothing can be done to speed things up. But you will get higher speeds using a FTP connection vs SMB (Samba).