Learn AD in 15 Minutes a Week: Windows 2000 Server Software Management Tools Page 3
Software Distribution Points
Software Distribution Points are network locations where the software is located so that when users or systems have software published or assigned through group policy, they can access it from these locations.
Software Distribution Points are created when you set up distribution folders on a network file server and share them out (\\<SERVERNAME>\<SHARENAME>). Once this is done, you can copy all of the applicable software and software packages, any modifications, and any other necessary files, to the SDP.
The maximum permission needed so that users and computers can access and install the software is READ, and this is the maximum than should be set for regular users.
Permissions settings for software installation pertain only to the application installation process itself.
This is done by opening the GPO and going to either the Computer or User Configuration section, depending on where it is located. From here you would go to the Software Installation node under Software Settings and right-click the application in the details pane (right hand side) where you want to specify software installation permissions, and then click Properties to get to the property page.
In the Security tab of the application's Properties dialog box, click on whichever security group you need to in order to set permissions.
The maximum permission needed so that users and computers can access and install the software is READ/ALLOW, and this is the maximum than should be set for authenticated users.