Deploy Softwares in windows XP unattended install

Dear TechRepublic Team

I am using Nlite software to make my unattended Windows XP Disk for my Clints depending on the Clint request for some softwares like Adobe pro
or MS-Office or any other softwares
but we do install a pack of free softwares
in this application i can only add drivers very easy

any one please Help me on this
Note : I’m not much familiar with how to deploy a MSI package

Thank you in advance