Just modify the Window_Placement key in Internet Explorer before opening IE.
reg add "HKCU\software\microsoft\internet explorer\main" /v Window_Placement /t REG_BINARY /f /d 2C0000000200000003000000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF0005000000000000FC09000097030000
"C:\Program Files\Internet Explorer\iexplore.exe" -k