setup widescreen display for X under vmware

add lines below to /etc/X11/xorg.conf
in Section “Monitor”
ModeLine “1440×900” 100 1440 1500 1600 1700 900 1000 1100 1200
ModeLine “1680×1050” 100 1680 1700 1800 1900 1050 1100 1200 1300
in Section “Screen”
in SubSection “Display”
Modes “1680×1050” “1440×900”

restart X to take effect

reference: http://communities.vmware.com/docs/DOC-1820