samba problem

[Nathan England]

I have a folder called /files
everyone has access to this folder, but there are a few folders inside that 
only a few people are allowed to access. What is the best way to allow 
everyone access to the /files directory but only allow those required to have 
access to the specific folders inside?

Do I create a seperate share for each specific folder? 
I want to avoid mapping more drives to the users. Can I change the access 
permissions on the windows machines? I don't want to make it too confusing. 
What is the best way?