I didn't put the patch together, but I did find the solution written in one of the forum notes.

I really don't know where the output file goes, it certainly does not show up in the output folder feed/google but when you click on the link once the file is generated, you can download the xml file.

Did you get it to work? I had to try the sql patch 2x before it kicked in. Not sure why. Maybe the patch itself is buggy but right now it works.