Another option...
That downloaded file may work, if you install
Word Viewer 2003, first.
The whole procedure will be like this:
1.
Download and install Word Viewer 2003.
2.
Install Works 6.0 Converter for Works and Word Users (wp6rtf.exe)
3.
Start Microsoft Office Word Viewer 2003 from Start > (All) Programs.
4.
An Open dialog appears. At the bottom of this dialog ensure that the Files of type drop-down is set to All Files(*.*).
5.
Now browse to your .wps file and select it.
6.
Click Open. A warning dialog will appear. If you trust this file et cetera, click Yes and, like magic, your .wps will open!
7.
Choose Edit > Select All then Edit > Copy.
8.
Now open OpenOffice.org 2.x Writer and do Edit > Paste.
9.
You should now see the text of your document in OpenOffice.org 2.x.
10.
Choose File > Save As and save your document in your preferred format and location.