Regarding the installation of content from the Dell catalogs. All Dell content is based on WMI queries into their own OpenManage WMI namespaces. You'll need to publish and deploy the Dell OpenManage Inventory Agent. Note, also, that there are separate inventory agent packages for clients and servers, and there are several versions of each. Make sure you get the current (or correct) version. (I'm not quite sure why there are multiple packages in the Dell catalogs.)
To modiify any package contained in Patch Manager, select the package, use the Duplicate action to make a clone of the package, and then use the Edit action to open the package in the Package Wizard and make the desired changes. Save and publish the modified package.
I just deployed the Dell OpenManage Inventory Agent (for Dell Business Client Systems) so that should be correct agent and that installed well on few test laptops. And after that the installation of Dell Multi-Touch Touchpad,7.1208.101.125,A10 is also successful. But still the systems where I first tried to install Dell Multi-Touch Touchpad,7.1208.101.125,A10 without first deploying the Dell Open Manage Agent does not seem to need the Dell Multi-Touch Touchpad,7.1208.101.125 as it shows as not applicable but may be it needs some time. This is not a real problem as these systems were just a few as used testing the deployment. Now I can deploy that missing driver to few hundred of Dell systems. Thank You.