G'day Johnny
1) You set the permissions required to access a tab/section/menu/item in the webtop xml.
2) You add these permissions in the security tab (the second section - I forget what it's called)
3) You go into the policy groups that you want to have these permissions (access these tabs) and set the permission to "yes" (I think its yes)
4) In user management, add the user to that group
Cheers
Blair