Hi Katrina, I'll try to help but I'll need to ask a few questions to see if I understand just what it is you're asking, but before I ask those questions, let me just mention that there are quite a few people who don't like 4-shared for downloading because of the incremental time it adds to each download, making it take a long time for users... there are other services (free ones) like mediafire and box.net that you may want to look into as well.
OK, now for the questions:
You mentioned that with 'other people's freebies there is a zip file', the way you mentioned this makes me think that you did not upload a zip file yourself, is that correct? Are you expecting 4-shared to create a zip file from the files you upload? That is not what happens, you have to put your files into an archive format (.zip or .rar, etc.) using a software that does that (there are free ones of those also - I recommend 7-zip
If you've uploaded individual files to 4-shared then there will be a separate link to each one of those files, those links are what you will need to 'share' so people can download. To find the link for each of your files, click on the file you want in your account and when you get to the download page for it, under the download button there an area that give you the URL to it. (Edited to add: If you're sharing multiple digi scrap files, you WILL need to zip them into one file first, no one wants to take the time to download multiple files in a kit).
Have I answered your questions with my questions? Post again if you need more help.