Go to my site (view in at least 1024x768) and grab Lite-On SOHW-1693S-Patched. It is already crossflashed and speed set to 16x.
You can also get it from here Codeguys . Download the KS04 patched. It will need to be run through Omnipatcher if you want to increase read speed higher than 8x. Note that some 1673S@1693S users report problems when using read speed=16x