Please log on to your McAfee Web based console :- www.mcafeeasap.com
Once you are there, Please click on the Polcies tab and then create a new policy. If you already have a new policy which was created by you, Then just edit that and under the Virus and Spyware Coverage tab, You will find the option to add EXCETIONS.
You can add files as well as folders to the Exceptions list. Please try and this and see if it helps.
Thank you very much Sameer!