imbolc, your downloaded files should go into your downloads folder. Once you have it, you can usually double-click on the file to open up the extract window. If you run into trouble looking at the contents of the zip file, it's possible you may not have a zip extraction software on your machine. If this is the case, you have to get that first before anything else.
Screenshot guide to patching:
http://www.project1999.com/forums/sh...d.php?t=205815
Video demo of patching:
https://www.youtube.com/watch?v=0T2PllWFHVA