I'll do both of those, thanks so much! Maybe this will solve my problem.
Okay, uninstalled Winzip and did changed file association on 7zip. Thanks so much for your help guys. If I'm still having problems I'll update this thread, but hopefully this works.
Just so ya'll know, ya'll were more helpful than Winzip support services... I still haven't heard back from them. :P
The above should work and you can also right-click on the Rar or Zip file, select Open With, then select what you want to use to open it with. Or navigate to it if it's not listed.