If you are running from a virtual floppy disk, then presumably you are running DOS as your boot O/S. It is likely that your problems with spanning are due to the network client. If Ghost is unable to determine whether the target drive can handle files > 2Gb then it will use spanning to ensure that a valid image can be created.
For modern hardware, a WinPE boot solution is much more compatible as DOS has no SATA support. You could generate your own WinPE boot solution or upgrade Ghost to 11.5.1.2266 as this version has support for Windows 7 as well as including WinPE and Ghost Boot Wizard to enable drivers to be added to WinPE easily.