You don't need to zip to upload to Kongregate. Export using "for Kongregate", then upload somewhere (dropbox?).
Then use their iframe-based submission form (can't find link to this on their site, but here it is: http://www.kongregate.com/games/new?iframe=true
Then they ask you to write them an email so that they approve it - you do that and wait for an email from them.