.zip help

I hope this post isn't too off topic...um, I have quite a bit of screencaps that I would like to share with a community, but it's too many to upload to Photobucket. I was wondering if it would be at all possible if someone could explain to me how to turn these caps into .zip files and provide a downloadable version for other lj users. Thank you in advance and sorry if this is completely off-topic.