Windows 2008 Folder Rights

I am embarrassed to ask this question, but it has been a very long time since I have done this.

I have a folder on a server, I want the root drive to be set up so everyone has access to read all the folders, in this case about 100 folders.   Each person will have 1 folder that they will have write access to, everyone else will have read access to.

On the root folder - What do I set the Share Permissions to?  What do I set the Security Permissions to?
On the sub folder - what do I set the Security Permissions to to give the owner of that full rights over that folder, but all other users read rights only?

I am getting tripped up somehow, I am missing something - on the sharing tab, if I give the user more than read rights, no matter what I do on the subfolders everyone can write/delete.


Thanks

C