Thanks you so much for great answers ScriptJunkie, sigung and DarkAngel!! *Free hugs* for you

I'm so grateful that you would answer me, I even considered quitting Zen Cart and just stick to ETSY since I'm such a newbie and things are too complicated for me, but it looks brighter now.

I'll do the backup and try to install the light-box this evening...
One question I forgot to ask was concerning step 4: "Upload the entire contents of the includes folder and the images folder to your server, again keeping the file structure intact." How can I manage to "keep the file structure intact"? I've unzipped the ZIP in my MAC. When I'm at the File Managers upload page, my pointer won't let me choose the entire "includes" and "images" folds, so shall I create two new folders where my zencart is located in the Filemanager and call the folders "includes" and "images" and then create and name the sub-folders within them and then upload all the files one by one into them in the same place/order they are in the ZIP file?
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