You should have looked in this thread
Free Cloud Storage - MediaFire
(same as post #11 above)

The file you require is the 4th one down. F2404_3_18_1a4_flash_image_NONE.rar

Extract this to a folder using 7Zip or WinRar and it will give you the .W file you require.

The 6th down is a later version of the file linked in the PDF.

This is a zip file and should be extracted before use.