interesting.... wonder where all the ; went....

you should be able to just type
render -r mr Figures5.mb
in the command prompt provided you have the cmd open at the
D:\Benny's\Maya\Projects\Chess\
location

if you find the powertoy for xp to open the cmd from any folder then that would make it easier for you since you just have to type that line instead of typing out the whole adress (ok, you'd only do that once but if you accidentally close the cmd then you have to do it again)