VMS device driver names are, by convention, two letters and the word
DRIVER, as in LDDRIVER.  This name is not only a file name, but must be
encoded in the device image itself.  In this way, the device identifies
itself to VMS.

Problems can exist if a site has two different drivers to be loaded, both 
of which have the same name.  This can sometimes happen when sites
purchase or evaluate a number of third party vendor products.  Since VMS 
will not allow different drivers to share the same name, one driver either 
must be renamed (typically through the vendor), or only one device can be 
used at a time. 

FIXDRIVER solves this problem by modifying the driver image internal name to
a user specified value.  Thus, a driver named LDDRIVER could be changed to
something else, say SPDRIVER.  Please note that FIXDRIVER only changes the 
internal image name.  The user will need to perform a RENAME on the file 
itself to rename it.

FIXDRIVER assumes that the "current" name of the driver is of the form
XXDRIVER.  If it is not, no change will be made to the image, and the 
program will report an error.