Wish I could figure out how to patch this. It's obviously over my head as I am a rookie at this. I'm actually also a little afraid of the marketplace forum here as I was scammed the one time I tried that route 6 years ago.
Are you getting a "hunk fail" message/error? what's the error?
The most common thing that fails is that you've modified your .htaccess file somehow... manually... or some plugin you installed did... so the patch fails when it doesn't recognize the file as being the default Magento .htaccess file.