Okay once you have your patterns in your patterns palette you can delete any you don't want to share by holding down the alt button (little scissors will appear when you hover over a pattern thumb) now click on the ones you don't want in the set.
Once you've done that you can click on the fly out and choose save patterns
when the save dialog box comes up, browse to where you want to save them ideally a new folder named appropriately, then name it designername_patternname and click save.
Go to the folder you saved them to in Windows explorer and add a preview and tou then zip that folder up and upload to where you share from.
There you go