Cannot copy very large files to a Guest Windows XP shared folder

Bottom Line: Don't copy files more than 1.2GB when using Shared Folder. Not sure why Microsoft limited Virtual PC's features this way. If the file is large, break it into chunks, copy to the VM then reconstitute. Another option is to zip the file and as long as it is less than 1.2GB then you can copy to the VM then unzip inside the VM environment.