Hey there... assuming that the executable path to Word is as i recorded... and the file name is MYFILE.doc you could use the following.
String[] cmdArray = new String[2];
cmdArray[0] = "c:\\Program Files\\Microsoft Office\\Office10\\winword.exe";
cmdArray[1] = "c:\\My Documents\\MYFILE.doc";
try {
Runtime.getRuntime().exec(cmdArray);
} catch (Exception exc) {}
Hope this helps!
Robin