Model: Multisync 520,521,720,721,920,921
Operating System: Not Specified (Note: might work with other versions of this os.)
Finally emailed an NEC Tech n Australia who sent it to me.
V720 is excellent easy to install, had to resise my screen after installing.
Other drivers in the file are NEC-Mitsubishi Multisync V520,V521, V720, V721, V920, V921
Hope you can use them