Question : Mcafee Agent 4.5 Automated installation

There is an article from mcafee about autiomating the installation of Mcafee Agent using Group Policy,  here is the instructions:

Summary
This article explains how to extract the components from framepkg.exe to allow Group Policy Object (GPO) deployment of McAfee Agent 4.x. This process only works for McAfee Agent 4.x and later. Earlier versions of the Common Management Agent cannot use this deployment method.
Solution
Required Components
•FramePkg.exe from your ePolicy Orchestrator server. By default, the path of the agent installation package on the ePO server is:

C:\Program Files\McAfee\ePolicy Orchestrator\DB\Software\Current\EPOAGENT3000\Install\0409\FramePkg.exe
 
•A file archive extraction tool such as WinZip
•Orca.msi (extract this from the Microsoft SDK download and install on your computer)
 
Step 1 - Extract the contents of FramePkg.exe
Create a new folder named FramePkg, then use your file archive extraction tool to extract the contents of Framepkg.exe to this folder. When the extraction completes, the folder should contain the files below:
•cleanup.exe
•FrmInst.exe
•MFEAgent.msi
•reqseckey.bin
•Sitelist.xml
•srpubkey.bin
 

Step 2 - Modify the MFEAgent.msi file

IMPORTANT:
•MFEAgent.msi contains many options and components required to ensure a successful Agent installation. Do not modify this file except as instructed below.
•These instructions assume that the user is familiar with modifying MSI files and knows how to use Orca. These instructions are provided only for modifying the MFEAgent.msi. McAfee support is unable to provide to further MSI or Orca assistance beyond these instructions.


1.Click Start, Run, type explorer, and click OK.
2.Navigate to the FramePkg folder you created in Step 1.
3.Right-click MFEagent.msi and select Edit with Orca.
4.Click AdvtExecuteSequence in the list of tables on the left.
5.Under the Action column, right-click AdvertisementError and select Drop Row (applies to McAfee Agent 4.0 only).
6.Click CustomAction in the list of tables on the left.
7.Under the Action column, right-click AdvertisementError and select Drop Row.
8.Click Property in the list of tables on the left.
9.Right-click anywhere on the right side of the window and select Add Row.
10.Type ADDLOCAL for the Property and click OK.
11.Type Main,Agent for the Value and click OK.
12.Right-click anywhere on the right side of the window and select Add Row.
13.Type REBOOT for the Property and click OK.
14.Type R for the Value and click OK.
15.Right-click anywhere on the right side of the window and select Add Row.
16.Type PRESERVEREPOSITORIES for the Property and click OK.
17.Type True for the Value and click OK.
18.Right-click anywhere on the right side of the window and select Add Row.
19.Type FRMINSTLOGFILE for the Property and click OK.
20.Type the full path and name of the file to contain the installation log (Example: C:\temp\mcafeeagent_install.log) for the Value and click OK.
21.Right-click anywhere on the right side of the window and select Add Row.
22.Type SITEINFO for the Property and click OK.
23.Type the UNC path to the SiteList.xml file and click OK.

This path must point to the network location that will contain the FramePkg folder when this process is complete.

Example: \\<UNCPATH>\FramePkg\SiteList.xml

Where <UNCPATH> is the network share where the “FramePkg” folder will be copied when this process is complete.

IMPORTANT: This location must be available to any system that will receive the McAfee Agent deployment via GPO. Ensure that the permissions on the share allow the necessary access to client systems.
 
24.Save the file, and close Orca.
25.Copy the FramePkg folder to the network location specified above.

Step 3 - Create the Group Policy Object

NOTE: These instructions assume that the user knows how to create and apply a GPO.  McAfee support is unable to provide to further assistance with GPOs beyond these instructions.

1.Create a new Group Policy Object.
2.Click Computer Configuration, Policies, Software Settings.
3.Right-click Software installation and select New, Package.
4.When prompted for a package, browse to the network location of the FramePkg folder and select the MFEAgent.msi file.
5.Select Assigned for the deployment method.
6.Assign this GPO to all Organizational Units (OUs) that require the McAfee Agent deployment.
7.Restart all computers in these OUs.
The McAfee Agent will be deployed to all computers in the selected OUs at the next client system restart.

ive tested alreayd this instruction and it worked, but my concern is, if a  system is already installed with the agent, how it will behave? it will uninstall the agent and re-install it again every time it log on?

Answer : Mcafee Agent 4.5 Automated installation

The plain answer is no. it willnot reinstall McAfee each time, only once.

Yuo can check Microsoft KB about the subject and how to make a reinstall acctually happen:
http://support.microsoft.com/kb/816102

Good luck with the deployment
O